War Secretary Pete Hegseth announces end to military flu vaccine mandate War Secretary Pete Hegseth announced in a video on X that he has signed a Pentagon order to end mandatory flu vaccinations. (Credit: X/@SecWar) NEW You can now listen to Fox News articles! War Secretary Pete Hegseth announced the end of the Pentagon 's long-running flu vaccine mandate for U.S. troops. "The War Department is once again restoring freedom to our Joint Force," Hegseth announced in an X post , linking to a