Comparison 1. Vitamin C for pneumonia prevention.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Incidence of pneumonia	2	736	Risk Ratio (M‐H, Random, 95% CI)	0.46 [0.06, 3.61]
1.2 Adverse effects (urticaria)	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only