Effectiveness of influenza vaccination.
Simonsen
Lone
L
Viboud
Cecile
C
Taylor
Robert J
RJ
D000368:Aged; D015982:Bias; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000401:mortality / Q000517:prevention & control*; D012621:Seasons; D016896:Treatment Outcome
D007252:Influenza Vaccines