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Defense Secretary Pete Hegseth announced Tuesday that the U.S. military will no longer require all service members to receive the annual flu vaccine, marking a significant shift in long-standing military health policy.
In a video posted on social media, Hegseth said the blanket requirement was “overly broad and not rational,” emphasizing that troops will now have the choice to receive the vaccine.
“Your body, your faith and your convictions are not negotiable,” he said.
Vaccination requirements in the U.S. military date back to the American Revolution, when George Washington ordered troops to be inoculated against smallpox in 1777.
More recently, vaccine mandates became a flashpoint during the COVID-19 pandemic. In 2021, the Pentagon required troops to receive the COVID-19 vaccine, resulting in more than 8,400 service members being separated for refusing the order.
Congress later rescinded that mandate, and the Defense Department formally dropped it in 2023 after vaccination rates exceeded 98% across active-duty forces.
Under the new directive, service members will still be permitted to receive the flu vaccine, but it will no longer be mandatory across the force.
A memo implementing the policy allows individual military branches to request exemptions to keep the requirement in place. Those requests must be submitted within 15 days.
The change represents a departure from longstanding Defense Department policy, which has historically required multiple vaccinations — including influenza — to maintain force readiness and prevent outbreaks.
The policy aligns with broader efforts by the administration of Donald Trump to scale back federal vaccine mandates and recommendations.
Earlier this year, the administration moved to limit universal vaccine guidance for children, arguing that such decisions should be made by families and doctors. That effort is currently on hold after a federal judge temporarily blocked the policy.
Pentagon officials have also focused on reinstating troops who were discharged for refusing the COVID-19 vaccine. As of March, the department said 153 service members had returned to duty under a reinstatement program offering back pay.
Public health officials have long recommended annual flu vaccinations for individuals six months and older, particularly in high-risk environments such as military settings.
The policy shift follows what health authorities described as a severe flu season, with elevated infection rates across the United States.
Critics of the change warn it could increase the risk of outbreaks among deployed forces, while supporters argue it restores personal choice and respects religious and medical concerns.
The U.S. military has historically maintained strict vaccination requirements to ensure operational readiness, especially in close-quarters environments where infectious diseases can spread rapidly.
A 2021 report by the Congressional Research Service listed at least eight vaccines commonly required for service members, including those for measles, polio and hepatitis.
While exemptions have been permitted for religious or medical reasons, they typically required review by commanders and consultation with medical personnel.
Military branches now have a limited window to request continued enforcement of the flu vaccine requirement, setting up potential variation across the services.
How widely those exemptions are sought — and whether the policy affects readiness or health outcomes — will likely shape future decisions on military vaccination policies.
Meta description: Pentagon ends mandatory flu vaccine for troops as Defense Secretary cites medical autonomy and policy shift from past mandates.
