The protective effect of childhood infections.
Johnston
S L
SL
Openshaw
P J
PJ
D001249:Asthma / Q000276:immunology*; D001424:Bacterial Infections / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D014777:Virus Diseases / Q000276:immunology*