Methods Recombinant interferon α-2a gel or placebo was applied 4 times daily for 8 weeks after condyloma acuminata was clinically cleared by laser 、 cryotheropy or electrodesiccation, both treatment groups were followed up for 12 weeks. 方法与安慰剂对照,尖锐湿疣患者经激光、冷冻或电灼清除疣体后,每日外用药物4次,疗程8周,再随访至第20周。