Intervention not reported
Adverse events (number of adverse events/person/year) · adults (> 18 years of age) with either COPD or recurrent acute exacerbations of chronic bronchitis
The intervention showed no clear difference in adverse events (number of adverse events/person/year) (low certainty).
1 finding from 1 review
- Haemophilus influenzae oral vaccination for preventing acute exacerbations of chronic bronchitis and chronic… 2017 · Cochrane Headline outcomes onlyRR 1.43 [0.7, 2.92]5 studies · 484 participantsLow