190628-N-IA905-1211 MANTA, Ecuador (June 28, 2019) Lt. Cmdr. Karla Valles, a U.S. public health service officer assigned to the hospital ship USNS Comfort (T-AH 20), listens to a patient’s pulse at a temporary medical treatment site. Comfort is working with health and government partners in Central America, South America, and the Caribbean to provide care on the ship and at land-based medical sites, helping to relieve pressure on national medical systems strained by an increase in Venezuelan migrants. (U.S. Navy photo by Mass Communication Specialist 2nd Class Morgan K. Nall/Released)