CD40LG and Acute hepatitis: Among these special populations, patients with acute hepatitis have the highest positive rate of anti‐HEV IgG (21.49%, 95% CI 12.65‐31.92; I2 = 99%), anti‐HEV IgM (8.62%, 95% CI 4.16‐14.51; I2 = 99%) and viral RNA (5.57%, 95% CI 2.26‐10.21; I2 = 99%; Figures S17‐S19).