The bivalent vaccine as well as the nine-valent vaccine clinically refers to the bivalent cervical cancer vaccine as well as the nine-valent cervical cancer vaccine. If you are within the age requirement for the nine-valent vaccine, you can get the nine-valent if you have had the bivalent vaccine. Usually, the age of vaccine recipients for the bivalent vaccine should be between 9-45 years old, while the age requirement for the nine-valent cervical cancer vaccine is between 16-26 years old. If you are not within the nine-valent age requirement, the nine-valent cervical cancer vaccine is not recommended. If you are a woman aged 16-26, you can get the nine-valent vaccine after you have had all the doses of the bivalent vaccine. The HPV types prevented by the bivalent vaccine are high-risk 16 and 18, while the HPV types prevented by the nine-valent vaccine are high-risk 16, 18, 31, 33, 45, 52, 58, and low-risk 6 and 11. Therefore, the nine-valent vaccine can prevent a wider range of viruses. Therefore, if your age permits, it is recommended that you get the bivalent vaccine and then get the nine-valent vaccine. Redness, swelling and pain at the injection site after the vaccination are generally normal and can resolve themselves in a short period of time. If the situation is serious, with systemic symptoms such as nausea, vomiting, diarrhea, fever, or severe pain that does not ease, promptly go to the hospital for treatment. Whether you have received the bivalent vaccine or the nine-valent vaccine, it does not mean that HPV infection will not occur again, so it is still recommended to go to the hospital regularly for cervical cancer screening.