Table 7.

Overall adverse reactions within 28 days after whole vaccination procedure in inactivated vaccine group of different ages vs. control group.

	No. of studies	RR (95% CI)	I2	P -value
Overall adverse reactions within 28 days after whole vaccination procedure	2	1.60 [1.27, 2.01]	57	<0.05*
3–5 years old	2	1.15 [0.81, 1.64]	28	>0.05
6–11/12 years old	2	2.41 [1.37, 4.23]	83	<0.05*
12/13–17 years old	2	1.71 [1.19, 2.46]	0	<0.05*

^*P < 0.05.