Sgt. Janelle Graham, a health care specialist from Sacramento, Calif., fills a syringe with flu vaccination at the Battalion Aid Station, on Camp Liberty, Oct. 1. The vaccination is an inactive virus, said Graham, with Headquarters Support Company, Division Special Troops Battalion, 1st Cavalry Division. Antibodies within the human body see the inactive virus, recognize it, and then seek a way to overcome it. 'The antibodies...are able to identify the infection in the future in order to attack it more efficiently,' she said. Photo by Spc. Howard Alperin

Staff Sgt. Renatta Draper (right), from Bemidji, Minn., winces as Sgt. Danielle Dubose, a health care non-commissioned officer, from Detroit, gives her the annual flu shot at the Battalion Aid Station, on Camp Liberty, Oct. 1. All personnel from Division Special Troops Battalion, 1st Cavalry Division receive the annual flu vaccination. According to the Center for Disease Control and Prevention, on average, more than 200,000 people are hospitalized from flu-related complications and 36,000 people die from flu-related causes each year. Photo by Spc. Howard Alperin