Chickenpox is transmitted by respiratory droplets, so there is a risk of transmission when eating together, but not through the digestive tract. Chickenpox can occur year-round, with peak incidence from April to June and from October to January, and people with low immune function are susceptible. Pregnant women can transmit chickenpox to their fetuses and cause fetal malformations. AIDS patients, diabetic patients, and pneumoconiosis patients are generally susceptible to infection. Chickenpox is an acute infectious disease caused by the varicella-zoster virus, which is highly contagious, but is not contagious after crusting. The rash has a centripetal distribution and can be seen as macules, papules and blisters, with the most frequent rash on the trunk and can develop on the face and extremities.