Scientists Dr. Joseph B. McCormick and Dr. Susan Fisher-Hoch. Their book, in collaboration with Leslie Alan Horvitz, is "Level 4: Virus Hunters of the CDC." It's a personal account of this husband/wife team's work with the world's most horrible diseases: Ebola, Lassa fever, Crimean Congo Hemorrhagic Fever, and AIDS. McCormick was instrumental in the creation of the high-tech "hot zone" lab at the Center for Disease Control in Atlanta. Fisher-Hoch was a pioneer in research on Legionnaire's Disease, Ebola and Lassa Fever.