Don’t take a shower on the day of the vaccination, don’t eat seafood, and don’t do strenuous activities, as follows: First, don’t take a shower: try not to take a shower on the day of the vaccination because the vaccination site should not be exposed to water for 24 hours. It is also easy to catch a cold and respiratory infections may occur, so try not to take a shower on the day. Second, do not eat seafood: seafood contains more allergy-prone ingredients. Third, do not engage in strenuous activities: strenuous activities after vaccination may cause excessive sweating or increase the risk of infection. You should drink more water after vaccination and drink water to avoid respiratory tract infections. You should also observe more about the vaccination site and the adverse reactions of the whole body, and if there is obvious discomfort, it is recommended to go to the hospital as soon as possible.