Poliomyelitis vaccine; epidemiologic observations on the safety and effectiveness in California in 1955.
D002140:California; D002648:Child; D002675:Child, Preschool; D006801:Humans; D015994:Incidence; D011051:Poliomyelitis / Q000276:immunology*; D012449:Safety; D014611:Vaccination; D014612:Vaccines
D014612:Vaccines
POLIOMYELITIS/immunology; VACCINES AND VACCINATION