Staff Sgt. Alicia Roger, right, Aerospace Medical Technician, 108th Wing Medical Group, New Jersey Air National Guard, gives Tech. Sgt. Larry Sherrington, 108th Civil Engineer Squadron, a flu shot at Joint Base McGuire-Dix-Lakehurst, N.J., Nov. 5, 2016. Flu vaccinations are mandatory for all service members. According to Centers for Disease Control and Prevention estimates, between 5 and 20 percent of Americans get the flu each year. Flu vaccination can reduce flu illnesses and prevent flu-related hospitalizations. (U.S. Air National Guard photo by Master Sgt. Mark C. Olsen/Released)