Human scabies is a debilitating skin disease caused by Sarcoptes scabei, known by several names such as "itch mite." At any given time, the worldwide burden of disease is about 300,000,000 people.
Limited effective treatments, coupled with recent observations of emerging drug resistance to oral ivermectin and 5% permethrin, raise concerns regarding the future control of scabies, especially ...
It's important to read the instructions carefully." This treatment must be repeated a week later. "Scabies is very infectious, but it can take up to 8 weeks for the rash to appear," the NHS continues.