The Advisory Committee on Immunization Practices (ACIP) comprises medical and public health experts who develop recommendations on the use of vaccines in the civilian population of the United States. The recommendations stand as public health guidance for safe use of vaccines and related biological products.
ACIP was established under Section 222 of the Public Health Service Act (42 U.S.C. § 2l7a) and is governed by its charter .
Further reading –
https://www.cdc.gov/vaccines/acip/about.html