Nine-valent vaccine refers to the nine-valent cervical cancer vaccine, and the vaccination precautions include: age, contraindications, vaccination time, and others. 1. Age: The age range of vaccination for the nine-valent cervical cancer vaccine may be between 16 and 26 years old. 2. Contraindications: Pregnant women should not be vaccinated; people who are allergic to yeast-like substances should not be vaccinated; although breastfeeding as well as menstruating women can be vaccinated, they need to be carefully considered for vaccination. 3. Vaccination time: the interval between the 2nd injection and the 1st injection may be 2 months, and the interval between the 3rd injection and the 2nd injection may be 4 months. 4. Others. After receiving the nine-valent cervical cancer vaccine, regular cervical cancer screening is required. You should pay attention to rest and eat a light diet in normal times.