Different HPV vaccines have different intervals between vaccinations: one month, two months, six months. HPV vaccines are divided into bivalent HPV vaccine, quadrivalent HPV vaccine and nine-valent HPV vaccine, and the specific intervals are as follows: 1. Bivalent HPV vaccine: suitable for ages 9-45 years old, the second injection is given one month after the first injection, and the third injection is given six months after the first injection. 2. Quadrivalent HPV vaccine: suitable for age 9-45 years old, the second injection is given two months after the first injection, and the third injection is given six months after the first injection. 3. Nine-valent HPV vaccine: suitable for age 16-26 years old, the second injection is given two months after the first injection, and the third injection is given six months after the first injection.