This material was prepared by American Institutes for Research (AIR). It is redistributed by IPRO HQIC, a Hospital Quality Improvement Contractor, under contract with the Centers for Medicare & Medicaid Services (CMS), an agency of the U.S. Department of Health and Human Services (HHS).
As of February 2021, frequently asked questions in this document refer to the two vaccines available in the U.S. at the time of this publication. These vaccines were developed by Moderna and Pfizer. Both the Pfizer and Moderna vaccines require two separate doses, or shots, in order to be fully vaccinated.