The main danger of taking the nine-pronged shot is that there will be some adverse reactions. Systemic adverse reactions include myalgia, fatigue, headache, fever, nausea, vomiting, itching and rash; local adverse reactions include pain, hardness, redness and swelling at the injection site. Most of the adverse reactions are mild to moderate in severity and may resolve on their own within a short period of time. In addition, although women who are menstruating or breastfeeding can receive the vaccine, they need to consider it carefully; women who are preparing for pregnancy, pregnant or allergic to yeast should not receive the vaccine. If adverse reactions occur after vaccination with the nine-valent vaccine, they usually recover after a few days of rest if the symptoms are mild, but if the symptoms are not relieved or are more serious, you should go to the hospital and ask the doctor to give you symptomatic treatment. The nine-valent vaccination only has a certain percentage of protective effect, so it is also necessary to go for regular cervical cancer prevention and HPV checkups.