The quadrivalent HPV vaccine requires three injections at intervals of 0, 2, and 6 months, on the day of vaccination, the second month after vaccination, and the sixth month, respectively, and it is best to complete the overall vaccination within one year in order to achieve a better preventive effect.
The quadrivalent HPV vaccine protects against HPV types 6, 11, 16 and 18, preventing most cervical cancers and genital warts.
Generally, there is still a risk of HPV infection after 1-2 HPV vaccine injections, and full immunity can only be achieved after all 3 vaccine injections are completed. The time for the 2nd and 3rd injections can be extended according to the actual situation, and it is best to complete the overall vaccination within 1 year in order to achieve a better preventive effect.
There may be certain adverse reactions after vaccination, such as redness, swelling and pain at the vaccination site, headache, fever, fatigue, etc. However, there is no need to worry, and most of the symptoms will disappear within one to two weeks after vaccination. To better minimize these symptoms, it is recommended to consult a medical professional before vaccination.