The nine-valent vaccine works to prevent cervical cancer, which is the only cancer that has a clear cause and is also preventable. The nine-valent vaccine works for most types of HPV viruses and can achieve the goal of preventing cervical cancer. The nine-valent vaccine is available at community health centers in many large cities, but because the current production of the vaccine is not particularly large, demand currently exceeds supply. It is recommended to make an appointment at the nearest community health center, and you can wait in line to receive the vaccine after the appointment.