Letter: Influenza vaccination.
D000917:Antibody Formation; D006801:Humans; D009980:Influenza A virus; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D009975:Orthomyxoviridae; D014611:Vaccination; D014613:Vaccines, Attenuated
D007252:Influenza Vaccines; D014613:Vaccines, Attenuated