Examination by PCR technique indicated that exposure of HBsAg-positive serum to ultraviolet rays with a radiation intensity of 105 μ W / cm 2 for 8 hr had certain inactivating effect on HBV-DNA .

经用PCR法技术检测，以辐照度值＞105μ W／cm2的 紫外线对HBsAg阳性血清照射8小时，对HBV－DNA有一定灭活作用。