Chickenpox is an acute infectious disease caused by the initial infection of varicella zoster, which is transmitted by respiratory tract or contact and is highly contagious, making it easy to be infected if you have a low immunity. The general incubation period is 12-21 days, with an average of about two weeks, which means that contact with a person with chickenpox, if infected with the virus, may result in the onset of the disease 12-21 days after contact. If you do not develop the disease after this time, it means that you are not infected with chickenpox. The chickenpox vaccine is still effective three days after exposure to chickenpox, so if you are concerned about the possibility of getting sick, consider getting the chickenpox vaccine. After contracting chickenpox, pay attention to rest, drink more water, eat a light, easily digestible diet, and avoid spicy, fish and shrimp foods. Maintain personal hygiene, change underwear regularly, keep the skin clean, keep the indoor air fresh, ventilate frequently, and have appropriate temperature and humidity.