Boys can also get the nine-valent which is beneficial for both boys as well as girls. When people talk about the nine-valent, they are generally referring to the nine-valent vaccine which is also known as the nine-valent human papillomavirus vaccine. Currently, the vaccine is used to prevent cervical cancer in women, as well as precancerous lesions in the vagina, cervix, and external genitalia associated with HPV infection. Although the nine-valent vaccine has not been promoted among boys, boys are also at risk of HPV infection, so if they are vaccinated with the nine-valent vaccine, the chances of transmitting the virus to girls can be greatly reduced, thus reducing the incidence of cervical cancer in girls. In addition, boys who have received the nine-valent vaccine can reduce the incidence of warts, penile cancer and other diseases. It is recommended that boys who have the need for the vaccine can consult a specialist.