Babies may have a fever after a few days of chickenpox vaccination, you can supplement warm boiled water and take antipyretics to relieve the symptoms. 1. Supplementation of warm boiled water: baby chickenpox vaccine for a few days may have a fever, this is a common reaction, is any vaccine will appear after vaccination of the normal reaction, usually accompanied by fever, the body temperature will not be too high, 1 ~ 2 days will return to normal. You can give your child more warm water, the child’s body consumes a lot of water after the fever, to drink more warm water. 2. Take antipyretic medicine: babies may have fever a few days after chickenpox vaccination. If the fever of children is higher than 38.5 ℃ under the armpit, there will be headache, generalized soreness, weakness, poor mental state, etc., you can give antipyretic medicine, such as acetaminophen, ibuprofen and so on. If the symptom of fever after a few days of chickenpox vaccination persists without relief, timely medical treatment is needed.