What should you pay attention to before and after receiving the HPV-9 vaccine?

　　The term "9-valent" refers to the 9-valent human papillomavirus (HPV) vaccine. Before receiving the 9-valent HPV vaccine, individuals should pay attention to age eligibility, physical condition, allergy history, vaccination intervals, and health disclosure. After vaccination, it is important to monitor for reactions, care for the injection site, avoid strenuous exercise, adjust diet, and follow the recommended vaccination schedule. Detailed analysis is as follows:

　　I. Pre-vaccination Considerations

　　1. Confirm Age Eligibility: Ensure you fall within the recommended age range for the vaccine. Policies may vary slightly by region, but generally the vaccine is suitable for individuals aged 9 to 45 years. Those outside this range may experience reduced vaccine effectiveness and should consult with a vaccination center in advance.

　　2. Assess Physical Condition: Make sure there are no acute illnesses present before vaccination, such as fever, colds, or severe diarrhea. Vaccination during an acute illness may worsen symptoms or impair the immune response to the vaccine.

　　3. Check Allergy History: Determine whether you are allergic to any vaccine components or yeast. The vaccine may contain yeast due to the manufacturing process. Individuals with known allergies should fully disclose their medical history prior to vaccination to prevent potential allergic reactions.

　　4. Plan Vaccination Intervals: Be aware of the vaccination schedule, which typically requires three doses. Plan your appointments in advance to ensure timely administration, maintain adequate antibody levels, and ensure optimal immunity.

　　5. Complete Health Disclosure: Disclose all relevant medical history truthfully before vaccination, including whether you have had cervical cancer or suffer from any immune system disorders. This information is crucial for determining vaccine suitability and must not be concealed.

　　II. Post-vaccination Care

　　1. Monitor for Reactions: Remain at the vaccination site for observation for 30 minutes after injection. Some individuals may experience dizziness, nausea, or local redness and swelling, which usually resolve on their own quickly. Seek immediate medical advice if symptoms are severe.

　　2. Care for Injection Site: Avoid getting the injection site wet for 24 hours after vaccination. Moisture may lead to local infection, causing redness, swelling, or pus formation. Keep the area clean and dry, and avoid scratching.

　　3. Avoid Strenuous Exercise: Reduce intense physical activities such as running or swimming for 1–2 days after vaccination. Strenuous exercise may strain the muscles at the injection site, increasing pain or discomfort.

　　4. Adjust Diet: Avoid alcohol and reduce intake of spicy or irritating foods shortly after vaccination. These substances may stimulate the body or exacerbate adverse reactions, delaying recovery.

　　5. Follow the Vaccination Schedule: Remember the scheduled dates for subsequent doses and complete the full vaccination series on time. Failure to complete all doses may result in insufficient antibody levels and suboptimal protection.

　　After vaccination, continue monitoring your health. If redness and swelling at the injection site persist beyond three days, or if high fever, severe rash, or other serious symptoms occur, seek medical attention immediately.