Defense Secretary Pete Hegseth has scrapped the Pentagon's annual mandatory flu-shot rule, making the influenza vaccine voluntary for service members and Defense Department civilian staff, effective immediately. The shift, laid out in an April 20 memorandum, applies to both active-duty and reserve components and marks a sharp break from long-standing military immunization policy.
What the memo says
A memorandum posted by the Defense Department states, "Effective immediately, the annual influenza vaccine is voluntary for all Active and Reserve Component service members and Department of War civilian personnel." It directs the Under Secretary of War for Personnel and Readiness to consolidate any exception requests, and instructs the military services to submit those requests to the Assistant Secretary for Health Affairs within 15 days.
The memo explains that those exception requests will be taken into account when updating DoD Instruction 6205.02, the department's immunization rulebook.
How the announcement was made
Hegseth rolled out the change in a brief video posted to X, saying, "We are discarding the mandatory flu vaccine requirement, effective immediately." The video, along with the underlying memo, was reported by LiveNOW from FOX, which shared both the footage and the document.
How this breaks with past policy
For years the Pentagon's immunization program has treated the seasonal flu shot as a basic readiness requirement, with DoD Instruction 6205.02 spelling out who gets vaccinated, when and how. Making the shot voluntary is a clear departure from that long-established approach.
The timing also follows the bruising political and legal fights over COVID-19 vaccination in the ranks. Roughly 8,200 service members were discharged for refusing the COVID-19 vaccine, and only a small number have returned to uniform under subsequent policy changes, The Associated Press reported.
Public-health context
Federal health advice has not changed on the civilian side. The Centers for Disease Control and Prevention still recommends that everyone 6 months and older receive a flu vaccine each season, citing its role in reducing severe illness and hospitalizations.
Public-health experts have long warned that when vaccines become voluntary, uptake can drop, particularly in close-quarters environments like ships, training barracks and military medical facilities.
What service members should expect
The new policy does not completely erase all flu-shot requirements. The memorandum allows the services to seek narrow exceptions for specific missions or occupational specialties, and tells component heads to route those requests through personnel and medical channels.
Commanders and medical officers can still require or strongly recommend flu vaccination in units where leaders believe the risk to mission readiness is high. Officials will weigh any submitted exception requests as they update the overarching immunization instruction, according to the memo posted by the Defense Department.
What happens next
Pentagon and service leaders now have to translate the memo into on-the-ground rules. That means issuing service-level directives, deciding which billets or missions, if any, will still require flu shots, and managing the exception process ahead of the next flu season.
The move also overlaps with ongoing reviews of pandemic-era discharges and potential reinstatements, a process that has so far brought only a limited number of discharged troops back into the ranks. In the coming months, commanders and medical staff are expected to roll out detailed guidance on how the voluntary policy will affect deployments, medical readiness checks and access to flu vaccine clinics.
