又是受虐狂啊。。。![[em04]](https://emojis.huaren.us/static/emojis/v1/default/em04.gif)
![[em04]](https://emojis.huaren.us/static/emojis/v1/default/em04.gif)
There are two classes of HPV (human papilloma virus), one class is low-risk HPV, and infection causes warts on the skin. The other class is high-risk HPV and its infection causes cervical cancer. The high risk HPV is transmitted through sexually contact.
The author doesn't have common sense
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