Maurice Ralph Hilleman (1919-2005) was an important and much honored American microbiologist who developed more than 40 important vaccines. He worked for E. R. Squibb & Sons, the U.S. Army Medical Center (now Walter Reed Army Institute of Research), and then Merck & Co. In 1963, when his daughter Jeryl Lynn came down with the mumps, Dr. Hilleman cultivated material from her and used it as the basis of a mumps vaccine.
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