Will concealing one's sexual history affect the administration of the 9-valent vaccine?

Generally, if there is no HPV infection or related disease, concealing one's sexual history before receiving the 9-valent vaccine has little impact on the vaccination process. However, if an individual already has an HPV infection or cervical lesions, withholding sexual history may affect the doctor’s assessment and subsequent health management. If in doubt, it is recommended to consult a healthcare provider in advance. Detailed analysis is as follows:

If a recipient has had sexual intercourse but is not infected with HPV and has no issues such as cervical inflammation or lesions, concealing sexual history would only prevent the doctor from fully understanding the background information. It does not affect the vaccine's ability to induce antibody production. The vaccine can still effectively prevent infection from non-infected HPV types, and the recipient can complete the full vaccination schedule through the standard procedure.

However, if a recipient has had sexual intercourse and is already infected with HPV or has conditions such as low-grade cervical lesions, concealing sexual history may prevent the doctor from recommending timely HPV testing and cervical screening. This could result in missing the opportunity for early detection of abnormalities. Furthermore, the doctor cannot inform the recipient that the vaccine offers no protection against HPV types they are already infected with, which is detrimental to their long-term health protection and regular monitoring.

Before receiving the 9-valent vaccine, individuals should honestly disclose their sexual history to the doctor to facilitate a comprehensive assessment of vaccination suitability. Those who have been sexually active are advised to undergo HPV testing and cervical screening in advance.