[Effectiveness of mass vaccination against influenza].
D035843:Biomedical Research; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D032541:Mass Vaccination; D014611:Vaccination; D014612:Vaccines
D007252:Influenza Vaccines; D014612:Vaccines
INFLUENZA/prevention and control; VACCINES AND VACCINATION
Ob effektivnosti massovoi vaktsinatsii protiv grippa.