Vaccination to prevent pneumonia.
D001291:Attitude of Health Personnel; D001294:Attitude to Health; D001428:Bacterial Vaccines / Q000008:administration & dosage*; D006801:Humans; D011018:Pneumonia, Pneumococcal / Q000517:prevention & control*; D011315:Preventive Medicine / Q000639:trends; D014481:United States
D001428:Bacterial Vaccines