Poliomyelitis in Liberia; prevalence of the disease, sero-immunity resulting from subclinical infection, and indications for prophylactic vaccination.
D058345:Asymptomatic Infections; D006801:Humans; D007988:Liberia; D011051:Poliomyelitis / Q000453:epidemiology*; D015995:Prevalence; D014611:Vaccination
POLIOMYELITIS/epidemiology