title: Studies set to test competing theories about early infection.
authors.forename: M
authors.initials: M
authors.lastname: Balter
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology; D002648:Child; D006801:Humans; D007938:Leukemia / Q000209:etiology* / Q000235:genetics / Q000276:immunology; D014780:Viruses / Q000472:pathogenicity