Immunologist

America's chief immunologist since 1984, Fauci has served under five presidents.

But research by Hyun Lillehoj and her team could offer a new way to reduce losses from the disease. Hyun Lillehoj is an immunologist in the Agricultural Research Service of the United States Department of Agriculture. She works in the Animal Parasitic Diseases Laboratory in Beltsville, Maryland. She led a team of scientists from research centers in South Korea.