Systematic review of reporting rates of adverse events following immunization: An international comparison of post-marketing surveillance programs with reference to China

► We compared the reporting rates of AEFI in China and elsewhere internationally. ► The AEFI reporting rates in China were generally consistent with other studies. ► Higher AEFI reporting rates were evident for DTwP and DTaP than most other vaccines. ► The AEFI rates for DTaP were lower than DTwP, but higher than expected in China. ► Substantial variability was found in cross-national definitions of AEFI.