Military Flu Outbreak
Flu Outbreak at Lackland Base Sickens 160 Trainees After Vaccine Mandate Ended
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Air Force officials said the outbreak has been managed by the 37th Training Wing “in close coordination with the 59th Medical Wing,” describing a “localized influenza outbreak among trainees at Basic Military Training.”
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Treatment for symptomatic trainees includes antivirals “such as Tamiflu,” according to CBS/statement details.
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ABC News reported that while at least 159 recruits were sick and two hospitalized, sources said the “actual number of cases and hospitalizations could be higher.”
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A Guardian report contextualized why Lackland is vulnerable to respiratory outbreaks, noting recruits live in communal settings (dormitories, eating together) at Joint Base San Antonio—an installation sometimes called “Military City” with about 70,000 service members.
A flu outbreak has sickened nearly 160 recruits at Lackland Air Force Base in San Antonio, with two hospitalized, less than two months after Defense Secretary Pete Hegseth ended the military's mandatory flu vaccine requirement. ABC News reported that at least 159 trainees have fallen ill and that the actual number of cases and hospitalizations could be higher.
Vaccination rates at the base dropped from near-universal compliance to roughly 40% after Hegseth made flu shots voluntary in April. The Air Force has now temporarily reinstated flu vaccinations for affected trainees, while isolating the sick, monitoring close contacts, and treating symptomatic recruits with antivirals including Tamiflu, according to CBS News.
Vaccination Rate Collapsed Before Outbreak Began
Before Hegseth's April policy change, flu vaccine compliance at Lackland was effectively 100%, driven by mandatory entry processing. Once shots became voluntary, uptake among the current trainee cycle fell to about 40%, according to ABC News. That gap left most recruits unprotected heading into an environment where disease spreads fast.
Lackland is part of Joint Base San Antonio, which houses roughly 70,000 service members. The Guardian noted that recruits in Basic Military Training share dormitories, bathrooms, and dining halls — conditions that accelerate airborne spread. In that setting, even a moderate immunity gap can trigger a rapid outbreak before the first cases are caught and isolated.
Air Force Scrambles to Contain the Outbreak
The 37th Training Wing is managing the response in close coordination with the 59th Medical Wing, the Air Force said. Symptomatic recruits are being isolated. Those who had close contact with sick trainees are being monitored. All symptomatic trainees are being offered Tamiflu or equivalent antiviral medication.
The Pentagon authorized a temporary reinstatement of flu vaccinations specifically for the affected wing, according to CBS News. Pentagon guidance allows commanders to require vaccines in specific circumstances through a risk-based exception process approved by the Under Secretary of Defense for Personnel and Readiness. Pentagon spokesman Sean Parnell called the outbreak "localized" and said the response shows the policy "working as intended."
A Trainee Died. The Cause Is Still Unknown.
Trainee Keon McDaniel died during the outbreak after being found unresponsive in his quarters. The Air Force launched an investigation immediately, according to ABC News. Officials have not confirmed whether his death was linked to the flu outbreak, and the cause of death remains undetermined.
McDaniel's death has intensified scrutiny of the policy rollback. His family has called for transparency about medical protocols at the base. Legal experts noted that if a connection to the voluntary-vaccine policy is established, it could expose the Department of Defense to significant litigation.
Hegseth Defends Policy as Critics Warn of Readiness Damage
Hegseth defended the mandate rollback as a rejection of "overly broad" requirements. Spokesman Sean Parnell said the policy gives commanders flexibility to respond to local conditions — and argued that is exactly what happened at Lackland. The Associated Press reported that Hegseth and Parnell both issued formal defenses of the broader policy on June 18 while addressing the base's situation.
Critics pushed back hard. Democratic members of the House Armed Services Committee called for hearings. Public health experts warned that voluntary vaccination in a communal training environment is "a recipe for a readiness disaster." Isolating 159-plus recruits disrupts training schedules, delays graduation cycles, and pulls medical staff away from other duties — directly cutting into the readiness the policy was supposed to protect, according to The Independent.
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