After vaccination, it is recommended to take a bath 24 hours after vaccination. After vaccination, a needle eye will be left on the skin, which should be kept dry to avoid skin infection. If you take a bath immediately after the vaccination, you may be afraid of the local redness, swelling and hard nodules caused by your baby’s scrubbing in the bath. When taking a bath, it is necessary to pay attention to the control of water temperature and ambient temperature to avoid catching a cold and fever, which may affect the efficacy of the vaccine. If the immune system of the baby is affected after vaccination, there is a possibility of adverse reactions such as fever and gastrointestinal discomfort. After vaccination, babies should rest more, drink more water, keep warm, avoid strenuous exercise, open the windows regularly for ventilation, and bathe after 24 hours if there is no other reaction.