[Survey on antibodies against measles virus and mumps virus in sera of children in Beijing].
D000293:Adolescent; D000367:Age Factors; D000914:Antibodies, Viral / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D002681:China; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008459:Measles virus / Q000276:immunology*; D009109:Mumps virus / Q000276:immunology*
D000914:Antibodies, Viral