Dr. Thomas Francis, Jr. was an American physician, virologist, and epidemiologist. Francis was the first person to isolate influenza virus in America, and in 1940 showed that there are other strains of influenza, and took part in the development of influenza vaccines. As director of the University of Michigan Poliomyelitis Vaccine Evaluation Center, he conducted the epidemiology studies prior to the release of Jonas Salk's polio vaccine. Wikipedia
The definitive Wikipedia entry for Thomas Francis Jr.. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Thomas_Francis,_Jr.
The definitive Wikipedia entry for Thomas Francis Jr.. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Thomas_Francis%2c_Jr%2e
