The 9-valent vaccine is administered three times a year, and each time you receive the 9-valent vaccine, you should avoid menstruation, and you should not receive the vaccine when you have a cold or fever, and you should not receive the vaccine when you are breastfeeding or pregnant. The 9-valent vaccine should be administered between the ages of 16 and 26 years old. After the vaccination, it is not allowed to eat spicy and irritating food and seafood, and it is not allowed to drink alcohol. You should not take a shower, do strenuous exercise, or behave aggressively on the day you return, and pay attention to keeping warm and not catching a cold. If there is redness, swelling and pain at the injection site after returning, it is a mild phenomenon and does not need to be managed, it is a normal phenomenon and will disappear naturally in about 2-3 days.