Fig. 2
From: Seasonal influenza vaccination in patients with COPD: a systematic literature review
a Seroconversion rate (95% Confidence interval) 4 weeks after seasonal influenza vaccination in patients with COPD (reference [mean age ± SD; range]), European Committee for Medicinal Products for Human Use (CHMP) criteria for licensure for subjects aged >60 years. b Seroprotection rate (95% Confidence interval) 4 weeks after seasonal influenza vaccination in patients with COPD (reference [age ± SD; range]), European Committee for Medicinal Products for Human Use (CHMP) criteria for licensure for subjects aged >60 years