A trainee in his sixth week of basic training died after falling ill on Friday and being taken to Brooke Army Medical Center, the Air Force said in a news release. It was not immediately clear whether the death of the trainee, Keon McDaniel, was related to the flu outbreak.

Barracks and military training are known for being incredibly effective environments for the flu to spread. Having a big chunk of your military get sick at once is a very real problem.