Effectiveness of influenza vaccination.
Nelson
Jennifer C
JC
Jackson
Michael L
ML
Jackson
Lisa A
LA
D000368:Aged; D015982:Bias; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000401:mortality / Q000517:prevention & control*; D012306:Risk; D012621:Seasons
D007252:Influenza Vaccines