02 December 2025 U.S. Naval Hospital Yokosuka Successfully Completes 2025 Flu Shot Campaign YOKOSUKA, Japan – U.S. Naval Hospital (USNH) Yokosuka launched its 2025 influenza vaccination season in October with mass vaccination events at Ikego and additional clinics across the main base of Commander Fleet Activities Yokosuka. These annual events are a cornerstone of the hospital’s preventive...