Maricopa County Covid-19 Vaccine Data

Key takeaways from this week’s data (as of 6/22/2021):

  • Over 2 million Maricopa County residents have received at least one dose of COVID-19 vaccine!
  • About 3.7 million COVID-19 vaccine doses have been given to Maricopa County residents.
  • Over 45% of all Maricopa County residents almost 52% of Maricopa County residents 10 years and older have received at least 1 dose of COVID-19 vaccine.
  • In the last week, Maricopa County residents received about 10,000 doses of COVID-19 vaccine per day.

Data updated every Wednesday around 12 p.m.


Vaccine Doses Received by Maricopa County Residents

Maricopa County residents can get a COVID-19 vaccine from a variety of sites, including state and local public health locations, doctor's offices, pharmacies, and at pop-up vaccination events. 

These data reflect the number of COVID-19 vaccine doses that have been given to Maricopa County residents (based on residential address), regardless of where they got the COVID-19 vaccine.

Data source: 

  • Maricopa County resident vaccine data: Arizona State Immunization Information System (ASIIS) via ADHS 

Maricopa County Residents Vaccinated with ≥1 Dose of COVID-19 Vaccine 

Maricopa County residents can get a COVID-19 vaccine from a variety of sites, including state and local public health locations, doctor's offices, pharmacies, and at pop-up vaccination events. 

These data reflect the number of Maricopa County residents (based on residential address) who have received ≥1 dose of COVID-19 vaccine, regardless of where they got the COVID-19 vaccine. 

The first figure shows the percent of all Maricopa County residents who have received ≥1 dose of COVID-19 vaccine. Each of the following four tables shows the demographics of the Maricopa County residents who received vaccine by sex, age, race, and ethnicity. 

  • Number of Maricopa Residents Who Are Vaccinated with ≥1 Dose (dark blue bars): 
    • Number of Maricopa residents in each category who have received ≥1 vaccine dose 
    • Column 1 calculation = # of Maricopa residents in one category (e.g., female) who have received ≥1 dose
  • Percent of All Maricopa Residents Who Are Vaccinated with ≥1 Dose (light blue bars): 
    • Percent of all Maricopa residents who have received ≥1 vaccine dose who fall into each demographic category (e.g., sex, age group, race, ethnicity) 
    • Column 2 % calculation = # of Maricopa residents in one category (e.g., female) who have received ≥1 dose / all Maricopa residents who have received ≥1 dose x 100
  • Percent of All Maricopa Residents (10 years of age and older) of Each Demographic Category (teal bars):
    • Percent of all Maricopa residents aged 10 years or older (i.e., those who might be eligible for vaccine) who fall in a demographic category (e.g., sex, age group, race, ethnicity) who have received ≥1 vaccine dose 
    • Column 3 % calculation = # of Maricopa residents in one category (e.g., female) who have received ≥1 dose / all Maricopa residents in that category (e.g., female) x 100


Data sources: 

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Map of Maricopa County Residents Vaccinated with ≥1 Dose of COVID-19 Vaccine

This map shows the percent of Maricopa County residents who have received COVID-19 vaccine by ZIP code and city of residence. ZIP codes and cities are assigned by geocoding the residential address in ASIIS, which is self-reported. This map has 4 different layers you can view:

  • Percent of all Maricopa County residents — allows tracking of the percent of all residents vaccinated over time, which will continue to increase as more people get vaccinated.
    • Received at least 1 dose of any vaccine type (i.e., 1- or 2-dose series)
    • Fully vaccinated (i.e., have received the 1st dose in a 1-dose vaccine series or the 2nd dose in a 2-dose vaccine series)
  • Percent of eligible Maricopa County residents — allows tracking of the percent of eligible residents who have been vaccinated. As of March 31, 2021, the eligible population used for map calculations is all Maricopa County residents 10 years and older using Census 2020 estimates. The number of residents who are eligible to receive COVID-19 vaccine changes with each vaccination phase, which prevents directly comparing the percent of eligible residents vaccinated between different phases.
    • Received at least 1 dose of any vaccine type (i.e., 1- or 2-dose series)
    • Fully vaccinated (i.e., have received the 1st dose in a 1-dose vaccine series or the 2nd dose in a 2-dose vaccine series)

Data sources:

  • Maricopa County resident vaccine data: Arizona State Immunization Information System (ASIIS) via ADHS 
  • Maricopa County population: Census 2020 estimates calculated by the geographic information system (GIS) software company, Esri
  • Vaccine-Eligible Maricopa County population: Census 2020 estimates calculated by the geographic information system (GIS) software company, Esri


Comparison

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Dashboard of Vaccination Rates by ZIP Code and Demographics

This dashboard shows the number and percent of Maricopa County residents who have received at least 1 dose of COVID-19 vaccine by ZIP code and demographics, including sex, age group, race, and ethnicity. ZIP codes are assigned from the residential address in ASIIS, which is self-reported and not geocoded.

Please note the following:

  • You can view a ZIP code's data by either clicking in the top left corner of the map (see image below) or by selecting the ZIP code from the drop-down menu in the top right corner or the dashboard.dashboard button dropdown circled
  • If you do not see all ZIP codes listed, click the "X" in the top left corner of the map (see image below).dashboard button x circled
  • Due to the size of the dataset, it can take several seconds for data tables to load after selecting a ZIP code.
  • Some demographic data (such as ethnicity) have a large amount of missing fields, meaning these data are not present in ASIIS. These data should be interpreted with caution.
  • All non-zero counts (and associated percentages) that are less than 10 are not provided to protect resident privacy.
  • Vaccination data for 4 ZIP codes that cross county lines and are more densely populated, including areas of Apache Junction and Queen Creek, are not provided because MCDPH does not have access to data for non-Maricopa County residents.
  • Dashboard counts are available for download at our open data webpage. Percentages of population vaccinated will be available in next week's download.

VIEW DASHBOARD

Data sources:

  • Maricopa County resident vaccine data: Arizona State Immunization Information System (ASIIS) via ADHS 
  • Maricopa County populations: Census 2020 estimates calculated by the geographic information system (GIS) software company, Esri

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Frequently Asked Questions

Vaccine administration sites are locations where a COVID vaccine-eligible person can be vaccinated. They include large sites such as the County- and State-operated PODs (points of dispensing), and smaller sites such as pharmacies and healthcare clinics. All vaccine administration sites can be found at the MCDPH Vaccine Location and ADHS Vaccine Finder websites.



The Arizona State Immunization Information System (ASIIS) is a state-owned database that tracks all vaccines given in Arizona, including the COVID-19 vaccine. All states have vaccine databases. Healthcare providers and other vaccine administrators are required to report all vaccines given to persons in who live in Arizona.

For the COVID-19 vaccine, some ASIIS data come from when a person registers for the vaccine (e.g., residential address, sex, race, ethnicity) and some ASIIS data come from the vaccine administrators (e.g., dose number, vaccine administration site).

MCDPH is given ASIIS data from ADHS, which includes information about Maricopa County residents who have received COVID-19 vaccine.



MCDPH reports data on vaccine doses allocated to Maricopa County vaccine administration sites and on Maricopa County residents who have received at least one dose of vaccine. MCDPH identifies Maricopa County residents by residential address.

ADHS reports data based on the county in which a person receives their vaccine.



If a field is missing in the data, it is marked as unknown. For example, if a Maricopa County resident registered to receive the COVID-19 vaccine and forgot to mark their birthday or race, it will be counted as “unknown.” If a person at the vaccine administration site did not fill in the dose number being received, then it will be marked as “unknown.”



When a person registers to receive a COVID-19 vaccine, they are prompted to fill in their race. This menu includes an option for “other,” in the event that a person does not identify with any of the listed races. A person who selects “other” will be included in this category in the race data.



Demographic data such as sex, race, and ethnicity are often limited by the data system being used. In this case, the options available in ASIIS for sex are limited to male and female, and do not allow people to select a different sex with which they might identify.

Similar limitations exist in population-level data, such as Census data, which are used to understand how many total people fall into different demographic categories. For example, we do not have total population data for Maricopa County residents who are non-binary or identify as something other than male or female. These limitations are something Public Health is aware of.



Race data are typically obtained when a person registers to receive a COVID vaccine and selects one or more race(s) with which they identify. A limitation of our population-level data (e.g., Census data) is that we only know total Maricopa County population numbers based on one race that a person identifies as.

People who identified as more than one race are counted in the race that has the smaller population in Maricopa County. For example, if someone marked both African American/Black and White in their vaccine registration data, they will be counted as African American/Black in the vaccine data.

We know different populations may face greater challenges getting COVID-19 vaccine. We want to be sure we use data like race to understand gaps in vaccination rates so we can appropriately target outreach to improve vaccine uptake.



Population-level data, such as Census data or ADHS Population Denominators, are not available for populations that are marked as “other” or are unknown. Because we do not know the total number of people who fall into these categories in Maricopa County, we cannot calculate the percent of these populations that have received COVID-19 vaccine.



All vaccine data from the Arizona State Immunization Information System for Maricopa County residents are based on the residential address submitted by the person during the vaccine registration process. These persons are considered to be Maricopa County residents at the time of vaccination, and are eligible to receive COVID-19 vaccine in Maricopa County.

People who do not live in Maricopa County year-round may not be included in Maricopa County population-level data, such as the Census or ADHS Population Denominators, because these data are based on where a person lives most of the time. This might cause some populations to have a higher percentage of the population having received COVID-19 vaccine. In other words, a person living in Maricopa County in the winter who received COVID-19 vaccine will be counted as a vaccinated Maricopa County resident, however that person might not be counted in the total population used to calculate the percent of the population vaccinated if they don’t live in Maricopa County year-round.

Because Maricopa County’s population grows during the winter every year, these are trends we see in many types of data.



There are two main reasons this occurs: 

  • Some vaccine administrators (e.g., Indian Health Services, other federal entities) receive COVID-19 vaccine allocated directly from the federal government and are not required to follow Maricopa County’s vaccine priority schedule. MCDPH calculates the percent of the vaccine-eligible population who has received ≥1 dose of COVID-19 by geographic area based on the Maricopa County vaccine phase. If people who fall outside of the Maricopa County vaccine-eligible phase are vaccinated, it can appear that >100% of that population has been vaccinated. 
  • People who do not live in Maricopa County year-round may not be included in Maricopa County population-level data, such as the Census or ADHS Population Denominators, because these data are based on where a person lives most of the time. This might cause some populations to have a higher percentage of the population having received COVID-19 vaccine. In other words, a person living in Maricopa County in the winter who received COVID-19 vaccine will be counted as a vaccinated Maricopa County resident, however that person might not be counted in the total population used to calculate the percent of the population vaccinated if they don’t live in Maricopa County year-round. 


Data files from past weeks’ reports can be found and downloaded at the County’s open data webpage.



The Maricopa County vaccine-eligible population for each ZIP code and city is determined using 2020 U.S. Census estimates calculated by the geographic information system (GIS) software company, Esri. Additional information about Esri’s methodology can be found on their website:



Because we have a 1-dose COVID-19 vaccine series (Johnson & Johnson/Janssen), our figures and map reflect that people who received 1 dose of this vaccine are fully vaccinated.

  • For figures showing vaccine dose-level data (i.e., “Vaccine Doses Received by Maricopa County Residents”), categories include:
    • 1st dose of a 2-dose vaccine series (i.e., the start of a vaccine series)
    • 1st dose of a 1-dose vaccine series and 2nd dose of a 2-dose vaccine series (i.e., the completion of a vaccine series)
  • For figures and tables showing person-level data (i.e., “Maricopa County Residents Vaccinated with ≥1 Dose of COVID-19 Vaccine”), all Maricopa County residents who have received at least 1 dose of any vaccine type (i.e., 1- or 2-dose series) are included.
  • For the map:
    • The “first dose” category includes all Maricopa County residents who have received at least 1 dose of any vaccine type (i.e., 1- or 2-dose series).
    • The “second dose/fully vaccinated” category includes all Maricopa County residents who have received the 1st dose of a 1-dose series or 2nd dose of a 2-dose series (i.e., are fully vaccinated).


The eligible population is determined using Census 2020 estimates, which is available in 5-year increments. At least one vaccine is authorized to be given to people as young as 12 years old, which means that using the 10+ population is the most accurate depiction of who is eligible to receive vaccine in Maricopa County.




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