Nine-valent stands for Human Papilloma Virus Nine-valent HPV Vaccine and the vaccination needs to be administered under the guidance of a medical professional. Nine-valent refers to the human papillomavirus nine-valent HPV vaccine, which can prevent nine types of human papillomavirus infections, such as type 16, type 18, type 31, type 33, etc. Since the persistent infection of the virus is closely related to the onset of cervical cancer, the vaccine has the effect of preventing cervical cancer. It is important to note that the appropriate age for vaccination with the HPV vaccine is between 9 and 45 years old, and is prohibited during pregnancy and breastfeeding, and is not recommended for patients with coagulation disorders. The HPV vaccine should be administered under the guidance of a medical professional in order to avoid adverse consequences.