Pentagon ends mandatory flu shots for US troops

The U.S. Department of Defense said on Tuesday, April 21, 2026, that it is ending the requirement for U.S. military personnel to receive an influenza vaccination. The announcement marks a shift in force health policy for the armed services and comes as the current administration has broadly sought to scale back federal vaccine recommendations, including those affecting children.

Defense Secretary Pete Hegseth said the change is intended to remove what he called “absurd, overreaching mandates,” arguing that such requirements weaken military capabilities. Officials emphasized that the policy does not prevent vaccination: service members may still choose to receive the flu shot on a voluntary basis.

The move follows an earlier reversal on vaccines inside the military. In 2023, the armed forces rescinded a COVID-19 vaccine mandate that had been put in place under former President Joe Biden. The Pentagon’s latest decision extends that broader direction of travel, shifting from compulsory vaccination toward individual choice for at least one routine immunization.

The policy affects a large population across the U.S. defense establishment. The U.S. military includes approximately 1.3 million active-duty personnel and more than 750,000 National Guard and Reserve members, according to the figures cited. Any change in medical readiness rules can therefore have wide operational and administrative reach, from training environments to deployments, even as the department frames the update as a mandate removal rather than a ban.

Internationally, the decision contrasts with guidance from the World Health Organization, which recommends flu vaccination for people aged 6 months and older. While the Pentagon’s announcement is specific to U.S. service members, it lands in a global context where influenza vaccination is commonly promoted as a public health measure, and where U.S. policy choices can influence debates among allies and partners that coordinate closely with U.S. forces.

For markets, the development is being watched by companies that supply influenza vaccines. Manufacturers Sanofi, CSL Seqirus, GSK, and AstraZeneca did not immediately comment. It remains unclear from the announcement how voluntary uptake among service members will compare with prior compliance under a mandate, and the Pentagon did not provide new guidance on implementation timelines, exemptions, or how the change will be applied across active-duty, National Guard, and Reserve components.