Leprosy is contagious, it is a chronic infectious disease caused by Mycobacterium leprae infection of the human body, the main ways of transmission are as follows: 1, spread by droplets, saliva, leprosy patients with bacteria in coughing, sneezing will spray droplets, saliva, if these droplets, saliva is inhaled by healthy people, it will lead to leprosy infection of healthy people, which is the most important way of leprosy transmission; 2. Close contact transmission, leprosy patients with broken skin and healthy people with broken skin in close contact, infection can also occur; 3, indirect transmission, healthy people who use leprosy patients clothing, bedding, towels may also be transmitted, but the chances are low. Therefore, in order to prevent leprosy, we must pay attention to personal hygiene, enhance nutrition and improve the immunity of the body. It is important to keep a distance from people at high risk of leprosy, and to seek medical attention and isolation measures when there are leprosy patients among relatives.