Generally, babies can take a bath after 24 hours after routine vaccination. However, if it is after a live vaccine such as diphtheria or measles, you can extend the time appropriately, preferably after 48 hours before taking a bath. It is not allowed to take a bath immediately after the vaccination because the baby’s skin is tender and can easily cause local infection. Usually, after vaccination, it is necessary to keep the eye area dry, clean and hygienic and not to scratch; pay attention to proper rest and not to exercise strenuously to facilitate antibody formation; drink more hot water and not to eat cold and oily food. In addition, after vaccination, babies may also have fever, rash, redness, swelling, heat, pain and other reactions at the vaccination site, so pay attention to observation and go to the hospital in time for serious cases. In addition, the baby should also pay attention to keep the water temperature and ambient temperature as constant as possible when bathing to avoid getting cold.