It is not advisable to swim immediately after vaccination, but usually after 24 hours. Because there is still an eye in the vaccination site after the vaccination, if you swim immediately after the vaccination, water may enter the eye, which may cause infection at the vaccination site. After 24 hours of vaccination, the vaccination site will gradually heal, and healthy people are generally unaffected by swimming at this time. When the human body after vaccination, due to human immunity factors and individual differences, some people may appear fever, local itching, redness, swelling and pain adverse reactions, if immediately swimming at this time will aggravate the incidence of adverse reactions and symptoms, should be immediately sought medical treatment, so as not to delay the condition. Clinical observation is required for 30 minutes after vaccination, no clinical symptoms can be left, if there are some adverse reactions need immediate medical treatment.