A syringe in the hand is worth two birds in the bush.
Mandell
Brian F
BF
D004196:Disease Outbreaks / Q000517:prevention & control*; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D007252:Influenza Vaccines / Q000008:administration & dosage; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D011008:Pneumococcal Infections / Q000453:epidemiology / Q000517:prevention & control*; D022242:Pneumococcal Vaccines / Q000008:administration & dosage; D014481:United States / Q000453:epidemiology; D014611:Vaccination / Q000379:methods*
D007252:Influenza Vaccines; D022242:Pneumococcal Vaccines