Prophylactic use of influenza vaccine in patients with chronic bronchitis. A pilot trial.
D001991:Bronchitis / Q000517:prevention & control*; D029481:Bronchitis, Chronic; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000276:immunology*
D007252:Influenza Vaccines
BRONCHITIS/prevention and control; INFLUENZA/immunology