Author: COVID-19 NEWS

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Links with this icon indicate that you are leaving the CDC website.

The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website’s privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.

For more information on CDC’s web notification policies, see Website Disclaimers.

CDC invites representatives from community-based organizations, local government, the private sector, academia, and the general public to learn more about how they can help slow the spread of COVID-19 in their communities. We feature experts from different parts of CDC’s COVID-19 response to deep dive into specific topics, helping you learn more about the latest scientific findings, guidance for operations, information resources, and answering your COVID-19 questions.

CDC invites representatives from community-based organizations, local government, the private sector, academia, and the general public to learn more about how they can help slow the spread of COVID-19 in their communities. We feature experts from different parts of CDC’s COVID-19 response to deep dive into specific topics, helping you learn more about the latest scientific findings, guidance for operations, information resources, and answering your COVID-19 questions.

Links with this icon indicate that you are leaving the CDC website.

The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website’s privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.

For more information on CDC’s web notification policies, see Website Disclaimers.

Links with this icon indicate that you are leaving the CDC website.

The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website’s privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.

For more information on CDC’s web notification policies, see Website Disclaimers.

COVID-19 Vaccinations in the United States Data DefinitionsTotal Doses Delivered; Total CountThe total number of vaccine doses that have been delivered. Doses delivered include those that the:jurisdiction (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses delivered data will result in double counting.
For states, Washington DC, the US Virgin Islands, and Puerto Rico, total counts of COVID-19 vaccine doses include doses delivered since December 14, 2020.
For the Republic of Palau, the Federated States of Micronesia, the Republic of the Marshall Islands, Guam, American Samoa, and the Commonwealth of the Northern Marianas Islands, total counts of COVID-19 vaccine doses include doses marked as shipped in VTrckS since December 13, 2020.
Doses Delivered; Rate per 100,000The total number of vaccine doses delivered for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
Total Doses Administered; Total CountThe total number of vaccine doses that have been given to people in the United States since December 14, 2020, the date when the first dose was administered to a person in the United States under the Emergency Use Authorization as a non-clinical trial. Doses administered in a jurisdiction (state, territory, tribe, or local entity) include those administered in:
jurisdictional (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and
federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses administered data will result in double counting. For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction in which the person received the dose.
Total Doses Administered; Rate per 100,000
The total number of vaccine doses given for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
People Receiving at Least One Dose (Formerly “Receiving 1 or More Doses”); Total Count*
Represents the total number of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
People Receiving at Least One Dose; Percent (%) of the Population*
Represents the percent of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine. This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who Are Fully Vaccinated (Formerly “Receiving 2 Doses”); Total Count*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who are Fully Vaccinated; Percent (%) of the Population*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
This definition differs from the current CDC Interim Clinical Considerations in two ways:
 According to the interim guidance, the second dose of Pfizer-BioNTech and Moderna vaccines should be administered as close to the recommended interval as possible, but not earlier than recommended (i.e., 3 weeks [Pfizer-BioNTech] or 1 month [Moderna]). However, second doses administered within a grace period of 4 days earlier than the recommended date for the second dose are still considered valid. If it is not feasible to adhere to the recommended interval and a delay in vaccination is unavoidable, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines may be administered up to 6 weeks (42 days) after the first dose. Currently, only limited data are available on efficacy of mRNA COVID-19 vaccines administered beyond this window.
To ensure adequate time for an immune response to occur, a person is considered fully vaccinated greater than or equal to 2 weeks after completion of a two-dose mRNA series or single dose of Janssen vaccine.

Rates per 100,000
Represent the rate of total doses delivered, the rate of total doses administered, the rate of people receiving at least one dose, and the rate of people who are fully vaccinated per 100,000. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as estimates to calculate rates for total doses delivered and total doses administered. In some limited circumstances, people might receive vaccinations outside the jurisdiction (state, territory, tribe, or local entity) where they live. These rates currently account for vaccinations that occur in the jurisdiction where the vaccination was administered.
Rates per 100,000 and Percent of the Population Metrics
Measures of vaccination are calculated among the entire population (i.e., all ages), the population who are aged 18 years and older, and the population who are aged 65 years and older.
Percent of the Population
Represents the percent of people receiving at least one dose and the percent of people who are fully vaccinated. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as denominators to calculate the percent of the total population, the percent of the population aged 18 years and older, and the percent of the population aged 65 years and older who have received at least 1 dose or who are fully vaccinated. The percent of the total population was derived using the location of residence.
CDC has capped the percent of population coverage metrics at 99.9%. These metrics could be greater than 99.9% for multiple reasons, including census denominator data not including all individuals that currently reside in the jurisdiction (e.g., part time residents) or potential data reporting errors.
TexasTexas provides aggregate dose count data to CDC; therefore, we do not receive specific information at the individual level. This limits our ability to directly calculate certain age-based metrics. Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics. As of February 24, 2021, to calculate age-based metrics, CDC assumes:
All people receiving vaccinations in Texas are considered residents of Texas,
The percentage of total doses that were administered to people aged 18 years and older is the same as both (effective February 24, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 18 years and older. CDC estimates the one-dose metrics for the adult population (18 years and older) of Texas by multiplying the count for the total population receiving at least one dose in Texas by the percentage of total doses administered to adults in Texas. CDC estimated the ”fully vaccinated” metrics for the adult population (18 years and older) of Texas by multiplying the total population who are fully vaccinated in Texas by the percentage of total doses administered to adults in Texas.
The percentage of total doses that were administered to people aged 65 years and older is the same as both (effective March 12, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 65 years and older. CDC estimates the “at least one dose” metric for the older population (65 years and older) of Texas by first obtaining the percentage of the 65+ population who have received ‘at least one dose’ from the state of Texas’ “COVID-19 Vaccination in Texas”external icon dashboard (percentages used are updated every Thursday). CDC then multiplies this percentage by the count for the total population receiving at least one dose in Texas. CDC repeats the same calculations to estimate the “fully vaccinated” metrics for the older population (65 years and older) of Texas. These values will also be included in the topline national totals for 65+.
Residents of Texas: Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics.
*CDC determined the number of people receiving at least one dose and the number of people who are fully vaccinated based on information that state, territorial, tribal, and local public health agencies and federal entities reported to CDC on dose number, dose manufacturer, administration date, recipient ID, and date of submission. Because the method used to determine dose numbers needs to be applied across multiple jurisdictions (states, territories, tribes, or local entities) with different reporting practices, CDC’s dose number estimates might differ from those reported by jurisdictions and federal entities. People receiving doses are attributed to the jurisdiction in which the person resides. When the vaccine manufacturer is not reported, the recipient is considered fully vaccinated with two doses.

COVID-19 Vaccinations in the United States Data DefinitionsTotal Doses Delivered; Total CountThe total number of vaccine doses that have been delivered. Doses delivered include those that the:jurisdiction (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses delivered data will result in double counting.
For states, Washington DC, the US Virgin Islands, and Puerto Rico, total counts of COVID-19 vaccine doses include doses delivered since December 14, 2020.
For the Republic of Palau, the Federated States of Micronesia, the Republic of the Marshall Islands, Guam, American Samoa, and the Commonwealth of the Northern Marianas Islands, total counts of COVID-19 vaccine doses include doses marked as shipped in VTrckS since December 13, 2020.
Doses Delivered; Rate per 100,000The total number of vaccine doses delivered for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
Total Doses Administered; Total CountThe total number of vaccine doses that have been given to people in the United States since December 14, 2020, the date when the first dose was administered to a person in the United States under the Emergency Use Authorization as a non-clinical trial. Doses administered in a jurisdiction (state, territory, tribe, or local entity) include those administered in:
jurisdictional (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and
federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses administered data will result in double counting. For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction in which the person received the dose.
Total Doses Administered; Rate per 100,000
The total number of vaccine doses given for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
People Receiving at Least One Dose (Formerly “Receiving 1 or More Doses”); Total Count*
Represents the total number of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
People Receiving at Least One Dose; Percent (%) of the Population*
Represents the percent of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine. This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who Are Fully Vaccinated (Formerly “Receiving 2 Doses”); Total Count*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who are Fully Vaccinated; Percent (%) of the Population*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
This definition differs from the current CDC Interim Clinical Considerations in two ways:
 According to the interim guidance, the second dose of Pfizer-BioNTech and Moderna vaccines should be administered as close to the recommended interval as possible, but not earlier than recommended (i.e., 3 weeks [Pfizer-BioNTech] or 1 month [Moderna]). However, second doses administered within a grace period of 4 days earlier than the recommended date for the second dose are still considered valid. If it is not feasible to adhere to the recommended interval and a delay in vaccination is unavoidable, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines may be administered up to 6 weeks (42 days) after the first dose. Currently, only limited data are available on efficacy of mRNA COVID-19 vaccines administered beyond this window.
To ensure adequate time for an immune response to occur, a person is considered fully vaccinated greater than or equal to 2 weeks after completion of a two-dose mRNA series or single dose of Janssen vaccine.

Rates per 100,000
Represent the rate of total doses delivered, the rate of total doses administered, the rate of people receiving at least one dose, and the rate of people who are fully vaccinated per 100,000. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as estimates to calculate rates for total doses delivered and total doses administered. In some limited circumstances, people might receive vaccinations outside the jurisdiction (state, territory, tribe, or local entity) where they live. These rates currently account for vaccinations that occur in the jurisdiction where the vaccination was administered.
Rates per 100,000 and Percent of the Population Metrics
Measures of vaccination are calculated among the entire population (i.e., all ages), the population who are aged 18 years and older, and the population who are aged 65 years and older.
Percent of the Population
Represents the percent of people receiving at least one dose and the percent of people who are fully vaccinated. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as denominators to calculate the percent of the total population, the percent of the population aged 18 years and older, and the percent of the population aged 65 years and older who have received at least 1 dose or who are fully vaccinated. The percent of the total population was derived using the location of residence.
CDC has capped the percent of population coverage metrics at 99.9%. These metrics could be greater than 99.9% for multiple reasons, including census denominator data not including all individuals that currently reside in the jurisdiction (e.g., part time residents) or potential data reporting errors.
TexasTexas provides aggregate dose count data to CDC; therefore, we do not receive specific information at the individual level. This limits our ability to directly calculate certain age-based metrics. Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics. As of February 24, 2021, to calculate age-based metrics, CDC assumes:
All people receiving vaccinations in Texas are considered residents of Texas,
The percentage of total doses that were administered to people aged 18 years and older is the same as both (effective February 24, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 18 years and older. CDC estimates the one-dose metrics for the adult population (18 years and older) of Texas by multiplying the count for the total population receiving at least one dose in Texas by the percentage of total doses administered to adults in Texas. CDC estimated the ”fully vaccinated” metrics for the adult population (18 years and older) of Texas by multiplying the total population who are fully vaccinated in Texas by the percentage of total doses administered to adults in Texas.
The percentage of total doses that were administered to people aged 65 years and older is the same as both (effective March 12, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 65 years and older. CDC estimates the “at least one dose” metric for the older population (65 years and older) of Texas by first obtaining the percentage of the 65+ population who have received ‘at least one dose’ from the state of Texas’ “COVID-19 Vaccination in Texas”external icon dashboard (percentages used are updated every Thursday). CDC then multiplies this percentage by the count for the total population receiving at least one dose in Texas. CDC repeats the same calculations to estimate the “fully vaccinated” metrics for the older population (65 years and older) of Texas. These values will also be included in the topline national totals for 65+.
Residents of Texas: Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics.
*CDC determined the number of people receiving at least one dose and the number of people who are fully vaccinated based on information that state, territorial, tribal, and local public health agencies and federal entities reported to CDC on dose number, dose manufacturer, administration date, recipient ID, and date of submission. Because the method used to determine dose numbers needs to be applied across multiple jurisdictions (states, territories, tribes, or local entities) with different reporting practices, CDC’s dose number estimates might differ from those reported by jurisdictions and federal entities. People receiving doses are attributed to the jurisdiction in which the person resides. When the vaccine manufacturer is not reported, the recipient is considered fully vaccinated with two doses.

COVID-19 Vaccinations in the United States Data DefinitionsTotal Doses Delivered; Total CountThe total number of vaccine doses that have been delivered. Doses delivered include those that the:jurisdiction (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses delivered data will result in double counting.
For states, Washington DC, the US Virgin Islands, and Puerto Rico, total counts of COVID-19 vaccine doses include doses delivered since December 14, 2020.
For the Republic of Palau, the Federated States of Micronesia, the Republic of the Marshall Islands, Guam, American Samoa, and the Commonwealth of the Northern Marianas Islands, total counts of COVID-19 vaccine doses include doses marked as shipped in VTrckS since December 13, 2020.
Doses Delivered; Rate per 100,000The total number of vaccine doses delivered for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
Total Doses Administered; Total CountThe total number of vaccine doses that have been given to people in the United States since December 14, 2020, the date when the first dose was administered to a person in the United States under the Emergency Use Authorization as a non-clinical trial. Doses administered in a jurisdiction (state, territory, tribe, or local entity) include those administered in:
jurisdictional (state, territory, tribe, or local entity) partner clinics,
retail pharmacies,
long-term care facilities,
dialysis centers participating in the Federal Dialysis Center Program,
Federal Emergency Management Agency (FEMA) partner sites,
Health Resources and Services Administration (HRSA) partner sites, and
federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons) in that jurisdiction.
Data for each federal entity are also reflected at the national level in the agency callout boxes on the map; combining these data with jurisdiction-level doses administered data will result in double counting. For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction in which the person received the dose.
Total Doses Administered; Rate per 100,000
The total number of vaccine doses given for every 100,000 people (overall, per the population aged 18 years and older and per the population aged 65 years and older). This allows comparison between areas with different population sizes.
People Receiving at Least One Dose (Formerly “Receiving 1 or More Doses”); Total Count*
Represents the total number of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
People Receiving at Least One Dose; Percent (%) of the Population*
Represents the percent of people who received at least one dose of COVID-19 vaccine, including those who received one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine. This metric includes everyone who has received only one dose and those who received more than one dose.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who Are Fully Vaccinated (Formerly “Receiving 2 Doses”); Total Count*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
People Who are Fully Vaccinated; Percent (%) of the Population*
Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot Johnson and Johnson’s Janssen COVID-19 vaccine.
For this measure, CDC’s COVID Data Tracker attributes each dose to the jurisdiction (state, territory, tribe, or local entity) in which the person resides. This includes doses administered by FEMA partner sites, HRSA partner sites, and federal entity facilities.
Estimates for the total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as the denominators to calculate percentages.
This definition differs from the current CDC Interim Clinical Considerations in two ways:
 According to the interim guidance, the second dose of Pfizer-BioNTech and Moderna vaccines should be administered as close to the recommended interval as possible, but not earlier than recommended (i.e., 3 weeks [Pfizer-BioNTech] or 1 month [Moderna]). However, second doses administered within a grace period of 4 days earlier than the recommended date for the second dose are still considered valid. If it is not feasible to adhere to the recommended interval and a delay in vaccination is unavoidable, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines may be administered up to 6 weeks (42 days) after the first dose. Currently, only limited data are available on efficacy of mRNA COVID-19 vaccines administered beyond this window.
To ensure adequate time for an immune response to occur, a person is considered fully vaccinated greater than or equal to 2 weeks after completion of a two-dose mRNA series or single dose of Janssen vaccine.

Rates per 100,000
Represent the rate of total doses delivered, the rate of total doses administered, the rate of people receiving at least one dose, and the rate of people who are fully vaccinated per 100,000. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as estimates to calculate rates for total doses delivered and total doses administered. In some limited circumstances, people might receive vaccinations outside the jurisdiction (state, territory, tribe, or local entity) where they live. These rates currently account for vaccinations that occur in the jurisdiction where the vaccination was administered.
Rates per 100,000 and Percent of the Population Metrics
Measures of vaccination are calculated among the entire population (i.e., all ages), the population who are aged 18 years and older, and the population who are aged 65 years and older.
Percent of the Population
Represents the percent of people receiving at least one dose and the percent of people who are fully vaccinated. The total population, population of those aged 18 years and older, and population of those aged 65 years and older are used as denominators to calculate the percent of the total population, the percent of the population aged 18 years and older, and the percent of the population aged 65 years and older who have received at least 1 dose or who are fully vaccinated. The percent of the total population was derived using the location of residence.
CDC has capped the percent of population coverage metrics at 99.9%. These metrics could be greater than 99.9% for multiple reasons, including census denominator data not including all individuals that currently reside in the jurisdiction (e.g., part time residents) or potential data reporting errors.
TexasTexas provides aggregate dose count data to CDC; therefore, we do not receive specific information at the individual level. This limits our ability to directly calculate certain age-based metrics. Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics. As of February 24, 2021, to calculate age-based metrics, CDC assumes:
All people receiving vaccinations in Texas are considered residents of Texas,
The percentage of total doses that were administered to people aged 18 years and older is the same as both (effective February 24, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 18 years and older. CDC estimates the one-dose metrics for the adult population (18 years and older) of Texas by multiplying the count for the total population receiving at least one dose in Texas by the percentage of total doses administered to adults in Texas. CDC estimated the ”fully vaccinated” metrics for the adult population (18 years and older) of Texas by multiplying the total population who are fully vaccinated in Texas by the percentage of total doses administered to adults in Texas.
The percentage of total doses that were administered to people aged 65 years and older is the same as both (effective March 12, 2021) the percentage of people who received at least one dose and the percentage of fully vaccinated people who are aged 65 years and older. CDC estimates the “at least one dose” metric for the older population (65 years and older) of Texas by first obtaining the percentage of the 65+ population who have received ‘at least one dose’ from the state of Texas’ “COVID-19 Vaccination in Texas”external icon dashboard (percentages used are updated every Thursday). CDC then multiplies this percentage by the count for the total population receiving at least one dose in Texas. CDC repeats the same calculations to estimate the “fully vaccinated” metrics for the older population (65 years and older) of Texas. These values will also be included in the topline national totals for 65+.
Residents of Texas: Residents of Texas who receive a vaccination in a different state or territory are not attributed to Texas in their population-based metrics but are still included in national-level metrics.
*CDC determined the number of people receiving at least one dose and the number of people who are fully vaccinated based on information that state, territorial, tribal, and local public health agencies and federal entities reported to CDC on dose number, dose manufacturer, administration date, recipient ID, and date of submission. Because the method used to determine dose numbers needs to be applied across multiple jurisdictions (states, territories, tribes, or local entities) with different reporting practices, CDC’s dose number estimates might differ from those reported by jurisdictions and federal entities. People receiving doses are attributed to the jurisdiction in which the person resides. When the vaccine manufacturer is not reported, the recipient is considered fully vaccinated with two doses.

Traveling on public transportation (such as airplanes, ships, ferries, trains, subways, buses, taxis, and ride-shares) can make getting and spreading COVID-19 more likely. CDC requires everyone to wear a mask while using public transportation into, within, or out of the United States and in US transportation hubs (airports; seaports; train, subway, and bus stations, and other terminals). When using public transport, also stay 6 feet from others as much as possible and avoid crowds, and wash your hands frequently. Learn more about reducing your risk while traveling: https://bit.ly/3m68x2R