Background: Pediculosis is one of the most common problems in the world. which despite the improvement of the health status. still has a global distribution. Since this disease is usually transmitted through direct (head-to-head) and indirect (using personal belongings of others) contact. https://afjlrgdbhs90ei.timeblog.net/70682665/reliability-and-safety-of-elevators-and-escalators-travelators-past-present-and-future