The cervical cancer 9-valent vaccine can prevent nine subtypes of HPV infection. The cervical cancer 9-valent vaccine has certain side effects, but they are not too obvious and usually do not require special treatment. The most common side effects are redness, swelling, pain, or fever in the area where the vaccine was injected. In addition, some patients may experience joint pain and muscle pain; some patients may also experience weakness and drowsiness; some patients may experience nausea, etc. These symptoms are relatively mild and rarely lead to serious complications. If the patient is allergic, there is also the possibility of allergic reactions, etc. HPV vaccination is not recommended during pregnancy or breastfeeding.