Cryotherapy plus oral zinc sulfate versus cryotherapy plus placebo to treat common warts: A double blind, randomized, placebo-controlled trial

Cutaneous warts are caused by a small group of specific types of human papillomaviruses. Cryotherapy is a highly effective treatment for patients with viral warts; however, it is a painful method and usually requires several treatment sessions. Zinc is a trace element with many proven effects on the immune system.