Vaccine data included in this report are taken from the Arizona State Immunization Information System (ASIIS).
County-level population denominators were obtained from the American Community Survey (ACS). These denominators were used to calculate the proportions among the county population overall and within specific demographic groups.
Some vaccination records for Maricopa County residents that were not administered in Maricopa County are included in these data; however, this is limited to other counties within the state of Arizona.
Not all vaccinations administered are reportable to ASIIS (i.e., adult vaccinations); however, COVID-19 vaccinations for all ages are currently reportable.