The main reason for not bathing after vaccination is to avoid inadvertently staining the eye of the needle with sewage, which may lead to infection at the eye of the needle, or even pus, and therefore is not conducive to the healing of the eye of the needle. It is also possible that the infection may not be absorbed effectively in the body, leading to failure of the vaccination. Therefore, it is recommended that the patient should not take a bath for the time being after the vaccination, and then take a bath after 2-3 days, because the eye of the vaccination has already healed, and getting wet again will not lead to infection, so you can take a bath at this time.