Comparison 2. Sensitivity analysis for risk of bias.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Hospitalization (number of participants hospitalized)	3	245	Risk Ratio (M‐H, Random, 95% CI)	0.60 [0.25, 1.47]
1.1 Unclear risk of bias	1	60	Risk Ratio (M‐H, Random, 95% CI)	0.53 [0.37, 0.75]
1.2 Low risk of bias	2	185	Risk Ratio (M‐H, Random, 95% CI)	0.69 [0.10, 4.61]