Karl Johnson (Virologist)

Karl Johnson M.D.

Karl M Johnson, MD is an American virologist known for discovering Machupo virus, Hantaan virus, and Ebola virus. He has held key positions in the American Society of Tropical Medicine and Hygiene.

Johnson studied medicine at the University of Rochester, and earned an M.D. and completed his medical residency at the Presbyterian Hospital in New York. He then worked at the National Institute of Allergy and Infectious Diseases (NIAID) with respiratory cold viruses.

Dr. Johnson next moved to the National Institutes of Health (NIH) field laboratory in the Panama Canal Zone, studying hemorrhagic fever agents. His time at the Centers for Disease Control (CDC) subsequently the Centers for Disease Control and Prevention in Atlanta, led to field work in Africa and Korea, where he established the first completely suited Level-4 laboratory of “special pathogens” for the safe study of viruses capable of infection by the respiratory route. While at the CDC, Johnson’s team isolated and named Ebola virus in Zaire and was instrumental in the discovery of Hantaan virus in Korea, as well as serving as Chief of the Special Pathogens Branch, Virology Division. He has heavily contributed to the tropical virology field.

In 1981, he left the CDC to work for the United States Army Medical Research Institute of Infectious Diseases as the Program Director of Hazardous Viruses.

He has also served as an adjunct professor of Medicine and biology at the University of New Mexico, where his energy is focused on hantaviral disease and ecology.

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