Persistence can overcome resistance to hospital immunization program.
D006745:Hospital Bed Capacity, 300 to 499; D006801:Humans; D017589:Immunization Programs / Q000706:statistics & numerical data*; D007252:Influenza Vaccines / Q000627:therapeutic use*; D007251:Influenza, Human / Q000517:prevention & control*; D008910:Minnesota; D014481:United States
D007252:Influenza Vaccines