Chickenpox is a common acute respiratory infection in children, and most countries and regions have had an epidemic of chickenpox. Chickenpox is highly contagious, and if one has not had chickenpox has not been vaccinated, there is a 90% chance of being infected if one touches a person with chickenpox for more than one hour, so chickenpox is easily spread within kindergartens, schools, hospitals and families. The respiratory secretions of a person infected with chickenpox have viruses, and the herpes fluid also has viruses in it, so chickenpox can be spread through the respiratory tract and also through close contact, so it is important to avoid contact in prevention. The virus will be discharged from the respiratory tract 1 to 2 days before the typical symptoms of chickenpox patients, and it will be contagious until the herpes dries and crusts, chickenpox patients are contagious. In addition, the herpes zoster patient’s herpes fluid also has a virus, contact with shingles patients may also be infectious chickenpox, but the respiratory tract of shingles patients do not have the virus, will not be transmitted through the respiratory tract. So to prevent chickenpox, you need to do a good job of isolation from both respiratory tract and contact. Try to avoid close contact with patients with chickenpox and shingles, including clothes, stationery, toys, tableware, toiletries and bed linen that may be contaminated with herpes fluid should be washed and disinfected before use. Besides, vaccination is an effective way to prevent chickenpox, and 2 doses of vaccination can achieve a protection rate of more than 95%, so it is recommended for children and adults who have not had chickenpox to receive chickenpox vaccination if they are able to do so.