A recent change affects military recruits. The flu vaccination is now required for those in boot camps across all services. This decision follows a previous move that made the shot optional.

Details about this development are available from the Pentagon, which confirmed the information to the press. The change comes as an outbreak has had a significant impact, although specifics are not provided here. Further information can be found through news sources, including the Associated Press, which reported on the matter after receiving confirmation from the Pentagon.