Hospital Corpsman 2nd Class Albert Delacruz fills a syringe with the flu vaccine in the medical department aboard the amphibious assault ship USS Boxer (LHD 4). Boxer is the flagship for the Boxer Amphibious Ready Group and, with the embarked 13th Marine Expeditionary Unit, is deployed in support of maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist Seaman Conor Minto/RELEASED)