The updated vaccines protect against the XFG strain.
Defense Secretary Pete Hegseth cited "medical autonomy" and religious freedom in the decision.
A Massachusetts judge ruled in favor of medical organizations in their litigation against HHS Secretary Robert F. Kennedy Jr. for his changes to federal vaccine policy.
As the U.S. flu season winds down, health officials say the flu vaccine didn't work very well, with one of its worst effectiveness rates in more than a decade.
Doctors say the best protection against the measles is the MMR vaccine.
Measles exposures have now been detected in Wake, Durham, and Johnston counties.