Maurice Ralph Hilleman (August 30, 1919 – April 11, 2005) was an American microbiologist who specialized in vaccinology and developed over three dozen vaccines, more than any other scientist. Of the fourteen vaccines routinely recommended in current vaccine schedules, he developed eight: those for measles, mumps, hepatitis A, hepatitis B, chickenpox, meningitis, pneumonia and Haemophilus influenzae bacteria. He also played a role in the discovery of the cold-producing adenoviruses, the hepatitis viruses, and the cancer-causing virus SV40.
He is credited with saving more lives than any other scientist of the 20th century. Robert Gallo described him as "the most successful vaccinologist in history".
1.) "The family were fundamentalist Lutheran Christians, although Hilleman himself later rejected religion." - Maurice Hilleman Inventor of more than 40 vaccines, Wednesday 20 April 2005, Caroline Richmond, The Independent.