Poliomyelitis in Nebraska during 1956:  incidence, virus studies, vaccine effectiveness and safety.
D035843:Biomedical Research; D006801:Humans; D015994:Incidence; D009329:Nebraska; D011051:Poliomyelitis / Q000517:prevention & control*; D012449:Safety; D014612:Vaccines
D014612:Vaccines
POLIOMYELITIS/prevention and control