If a child takes a bath after vaccination, the following measures can be taken: 1. Give the child more warm water to drink. Because children will have adverse reactions to vaccination after they have been vaccinated, giving them warm water will reduce the incidence of vaccination reactions. 2. Apply iodophor to children for local disinfection. The vaccine will cause local reaction to the vaccination, resulting in redness, swelling, heat and pain at the vaccination site, especially when bathing, the bath water will contaminate the child’s vaccination site and cause skin infection, so the application of iodophor disinfection will reduce the chance of skin infection.