Individual vaccines: were developed first: Tetanus, 1914; Pertussis, 1918; Diphtheria, 1923. DTP was licensed in 1949. Inactivated Polio Vaccine, 1955; trivalent live attenuated Polio vaccine, 1963. Combined Measkes, Mumps, Rubella, 1971, also after individual vaccines. Conjugated Haemophilus Influenzae type B, 1988. See www.immunize.org/timeline/ for more.
Answered 2/28/2015
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