Some unanswered questions about vaccination.
Brown
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USDA, Plum Island Animal Disease Center, Greenport, NY 11944-0848.
D000940:Antigenic Variation; D000956:Antigens, Viral / Q000235:genetics; D006801:Humans; D014611:Vaccination / Q000009:adverse effects; D014612:Vaccines / Q000276:immunology; D014765:Viral Vaccines / Q000009:adverse effects / Q000276:immunology
D000956:Antigens, Viral; D014612:Vaccines; D014765:Viral Vaccines