According to 39 Health Network, the nine-valent HPV vaccine is used to prevent cervical cancer caused by human papillomavirus infection, which can prevent more than 90% of cervical cancer. The vaccine was approved for marketing in the United States on 20/0/4 and entered the market in China on 20/0/5. Suitable for/kloc-women aged 0/6 to 26.
The nine-valent HPV vaccine covers nine human papillomavirus types: 6, 1 1, 16, 18, 3 1, 33, 45, 52 and 58 * *. The ninth order refers to a mathematical concept, that is, the highest degree of a polynomial is 9. In algebra, polynomials are obtained by adding or subtracting terms of different degrees, such as constant terms, linear terms and quadratic terms.