When Alex Tran went off to Sierra Leone to work as an epidemiologist, his parents were worried. His mom was "a wreck," according to his sister Jen, who followed him into the Ebola hot zone a few weeks later.
Last fall as the Ebola outbreak raged in West Africa, Alex, 28, was working at USAID. Jen, who's a registered nurse, was deployed with the U.S. Navy on a ship in the Arabian Gulf. They both were itching to get to the front lines of the epidemic to help.