In a Jan. 10 memo, Secretary of Defense Lloyd Austin rescinded the Aug. 24, 2021 memorandum mandating that members of the Armed Forces under DoD authority be vaccinated against COVID-19, and the memorandum of Nov. 30, 2021, pertaining to the vaccination of National Guard and Reserve personnel. 

This rescission requirement was established by the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023.
The announcement was made in a media release from the Department of Defense.

The release stated: “The health and readiness of the Force are crucial to the Department's ability to defend our nation. Secretary Austin continues to encourage all Service members, civilian employees, and contractor personnel to get vaccinated and boosted against COVID-19 to ensure Total Force readiness.”

The full rescission memorandum can be viewed at https://media.defense.gov/2023/Jan/10/2003143118/-1/-1/1/SECRETARY-OF-DEFENSE-MEMO-ON-RESCISSION-OF-CORONAVIRUS-DISEASE-2019-VACCINATION-REQUIREMENTS-FOR-MEMBERS-OF-THE-ARMED-FORCES.PDF