Part of the Great Minds of Medicine video series, which profiles some of the most important doctors and scientists in the world of modern medicine, Great Minds of Medicine: Infectious Diseases examines the work of Dr. Karl Johnson, aka "the disease cowboy." Johnson, who heads the CDC task force for the Ebola virus, discusses the cutting-edge research being done to combat the destructive illness. The video series is produced by PBS. ~ Betsy Boyd, Rovi