Question: Who was this American microbiologist who specialized in vaccinology that contributed to the development of the immunization vaccine against measles, mumps, and rubella (MMR vaccine)?
Sentence (from "Maurice Hilleman"): Of the 14 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.
Relevant evidence: No