Avoid bathing for 24 hours after the third dose. The third vaccination is mainly given by intramuscular injection, usually in the upper left arm in a triangular muscle, and there may be localized pinholes after the injection. If the area comes into contact with water, etc., it may lead to infection of the needle hole. Secondly, some people are more sensitive to the vaccine components and experience localized redness and itching of the skin after vaccination. If bathing for a short time may confuse the adverse reaction of the vaccine and is not conducive to subsequent observation. Usually 24~48 hours after the vaccine injection, you can decide whether to take a bath according to your own situation. If there is no local redness and swelling, and the hole of the needle eye has been closed, you can take a bath with lukewarm water at this time. However, it is necessary to pay attention to avoid water touching the injection location. If the local area has not yet recovered from the vaccination, or even redness or swelling occurs, you can postpone the bathing.