Fig. 2
Meta-analysis of the E75 vaccine delayed hypersensitivity reaction (DTH): STATA 15.0 was used to analyze the 6 clinical studies. The relative standard mean difference (SMD) value and the 95% confidence interval (CI) were used to describe the effect of the vaccine on vaccinated and control patients. Heterogeneity was tested with the Q measurement method (P = 0.186) and I2 measurement method (I2 = 33.3%). Meta-analysis of DTH of 685 patients in the vaccinated group and 587 patients in the control group showed that the DTH of the two groups was different (P < 0.05)