title: Letter: Reactions to immunization.
mesh_terms: D000361:Agammaglobulinemia / Q000209:etiology*; D006801:Humans; D007074:Immunoglobulin G; D007223:Infant; D007231:Infant, Newborn; D014613:Vaccines, Attenuated / Q000009:adverse effects*
chemical_list: D007074:Immunoglobulin G; D014613:Vaccines, Attenuated