Key clinical point: Influenza vaccination reduces the risk of hospitalizations associated with influenza in patients with COPD.
Major finding: Vaccine effectiveness ranged from 22% to 43% in various analyses.
Study details: A test-negative study of influenza vaccination effectiveness in 21,748 patients with COPD.
Disclosures: Canadian government grants funded the study.
Gershon AS et al. J Infect Dis. 2019 Sep 24. .