Google is your friend
https://www.cdc.gov/coronavirus/2019...ccination.html and double checking is my advise
Updated Nov. 5, 2021Air Crew Members
The Presidential Proclamation and CDC’s Order do not apply to crew members of airlines or other aircraft operators if such crewmembers and operators adhere to all industry standard protocols for the prevention of COVID-19 as set forth in relevant guidance for crewmember health issued by the CDC or by the Federal Aviation Administration in coordination with the CDC. Please see the Technical Instructions for more information.