The best vaccination age recommended by the United States is 1 1- 12 years old.
In some countries, in addition to 9-25 years old, 26-45 years old can also be vaccinated.
This is because:
When young, girls have good immunity and protection, so it is suggested that 9-25 years old is the appropriate age for vaccination. For mature women aged 26-45, the immunogenicity and protection are slightly lower than those of young women, but vaccination is still effective.
Another view is that after making love can't fight, which is wrong. The vaccine effect is better before sexual life, and the protection will be better after sexual life with regular cervical cancer cell detection.