A study of poliovirus antibody level in Accra.
D000367:Age Factors; D000906:Antibodies / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D005869:Ghana; D006801:Humans; D007109:Immunity; D007223:Infant; D007231:Infant, Newborn; D009500:Neutralization Tests; D011051:Poliomyelitis / Q000453:epidemiology / Q000276:immunology*
D000906:Antibodies