Varicella virus is weakly viable and survives in the air for about 0.5-1 hour. Varicella virus refers to varicella zoster virus (VZV), which belongs to the family Herpesviridae, DNA viruses. vZV is intolerant of high temperatures and acids and can be inactivated at room temperature for 60 minutes and at pH values less than 6.2 or greater than 7.8. And VZV cannot survive in the scab and is easily inactivated by disinfectants. However, it can survive for about 1 week at low temperatures suitable for VZV life, and even for about 8 years at -65°C in the herpes fluid. Varicella-zoster is highly contagious, and the population is generally susceptible to the disease, which can occur throughout the year, with a high incidence in winter and spring. Although VZV has a short survival time outside of the body, it is still important to pay attention to good protective measures, to do diligent window ventilation, diligent killing, and if necessary, vaccination can be given.