Vaccinations for infants and young children can effectively prevent them from developing certain complex and difficult-to-treat diseases later in life, greatly improving the survival rate and quality of life of infants. Babies should not be bathed within twenty-four hours of the immunization. The main reason for bathing is to prevent the wound from coming into contact with moisture and becoming infected. The main reason is to prevent the wound from coming into contact with water and becoming infected. After the vaccination, the baby’s immunity is lowered, and bathing is easy to catch a cold, which may cause the vaccination to become ineffective, so the wound should not touch water for twenty-four hours after the vaccination. Most vaccines take about a week to take effect, so try not to let your baby catch a cold during this time. Even though it takes longer for the vaccine to take effect, babies can still bathe normally after a day. Parents should also keep an eye on their babies for inflammation and redness in the eye of the needle after vaccination, and see a doctor promptly if there is any. After vaccination, in addition to not being able to bathe the baby on the same day, it is important to pay attention to the baby in the following three days to see if there is any physical abnormality, such as fever, diarrhea and vomiting, etc. If there is, it may be a reaction to the vaccination. If there is, the baby may have an abnormal reaction to the immunization and care should be taken. Babies should not be bathed on the day of vaccination, but can be bathed normally after 24 hours. Parents should also be aware of any abnormal reactions to the vaccine.