Military Reinstates Flu Shots as Recruit Outbreak Hits 275
The U.S. military has reinstated mandatory flu shots for recruits, just two months after the defense secretary made the vaccine optional for all troops.
The reversal comes as a flu outbreak at a Texas Air Force base has sickened 275 trainees and is connected to one recruit's death now under investigation.
What Actually Triggered the Reversal
The Army, Navy, and Air Force have each been granted exceptions to the optional flu vaccine policy and are once again mandating shots for basic trainees, according to ABC News' reporting on the policy change.
Case counts at Lackland Air Force Base, part of Joint Base San Antonio and the Air Force's main basic training hub, climbed sharply: 159 cases the week before, 222 a day before, and 275 by Wednesday, with four trainees hospitalized.
Only about 40% of new trainees at the base had been vaccinated when the outbreak began in early June, according to ABC News' sourcing — a sharp drop from the 100% vaccination rate that existed before the shot became optional.
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The Death That's Still Under Investigation
One detail separates this outbreak from a routine seasonal spike: a recruit's death that officials have not yet definitively linked to the flu.
Keon McDaniel, an Air Force recruit in his sixth week of basic training, experienced a medical emergency on June 12 and was transported to Brooke Army Medical Center, where he later died, according to the Air Force's own account cited by ABC News.
The cause of that medical emergency remains under investigation, and the Air Force has said a comprehensive medical review is underway to determine the facts — meaning, as of this writing, no official cause of death has been confirmed, and it is not established whether the outbreak and McDaniel's death are connected.
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How a 1945 Policy Got Reversed, Then Reversed Again
The flu shot requirement that briefly disappeared had survived nearly every other disruption since World War II.
Defense Secretary Pete Hegseth made the vaccine optional in April, framing the change as one of medical autonomy. "Your body, your faith and your convictions are not negotiable," he said at the time, scrapping a mandate that had existed since 1945 with only one brief pause in 1949.
Undersecretary of Personnel and Readiness Anthony Tata has now granted exceptions to that policy across the Army, Navy, Air Force, and National Guard, restoring the requirement specifically for recruits and other groups the Pentagon classifies as at-risk.
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What the Pentagon Is and Isn't Admitting
Officials have framed the reversal as a planned, methodical adjustment rather than a response forced by the outbreak's visibility.
Chief Pentagon Spokesman Sean Parnell said the exceptions followed "a comprehensive review," adding that the decisions were "based upon thorough risk assessments" designed to "maximize operational readiness, lethality, and force generation, while safeguarding at-risk populations."
A congressional staffer told CBS News that the process of reinstating the mandate for recruits had actually begun before the Lackland outbreak became public, with all military departments formally requesting exemptions by early May and receiving them in early June — timing that, if accurate, means the policy shift was already underway before the case count became politically visible.
The Criticism That's Already Begun
Not every response to the reversal has accepted the Pentagon's framing.
Rep. Joaquin Castro, whose district covers about half of San Antonio including Lackland, criticized Hegseth's original decision directly on X: "After Secretary Hegseth scrapped the military's flu vaccine mandate, it was only a matter of time before an outbreak occurred." He called the decision "reckless" and said it "undermined our military readiness."
The Department of Defense's own 2026 research found that recruits are hospitalized for the flu far more often than other troops, a finding that predates the outbreak and that critics argue should have informed the original policy change.
Key Takeaways
- The Army, Navy, and Air Force have reinstated mandatory flu shots for recruits, reversing Defense Secretary Pete Hegseth's April policy making the vaccine optional.
- Cases at Lackland Air Force Base climbed to 275, up from 159 the week before; four trainees have been hospitalized.
- Recruit Keon McDaniel died on June 12 after a medical emergency; the cause remains under investigation and is not yet confirmed to be flu-related.
- Only about 40% of trainees were vaccinated when the outbreak began, down from a previous 100% rate.
- The flu shot mandate, in place since 1945, is being restored specifically for recruits and other at-risk groups.
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World News Correspondent
Rachel Hayes reports on international affairs, geopolitics, and breaking world news. Based in London, she covers stories shaping the UK and global political landscape.
