Analysis of information sources in references of the Wikipedia article "Measles vaccine" in English language version.
A strain of measles virus isolated in 1954 by Dr. Thomas C. Peebles, instructor in pediatrics at Harvard, and Enders, formed the basis for the development of the present vaccine
A strain of measles virus isolated in 1954 by Dr. Thomas C. Peebles, instructor in pediatrics at Harvard, and Enders, formed the basis for the development of the present vaccine