papilloma virus

例句：

1. 1. Papillomavirus is a common cause ofgenital warts.
   乳头瘤病毒是生殖器疣的常见原因。
2. 2. The virus canbe transmitted through sexual contact and oral-genital contact.
   该病毒可通过性接触和口腔-生殖器接触传播。
3. 3. Researchersare trying to develop vaccines to preventthe spread of this virus.
   研究人员正在尝试开发疫苗来预防这种病毒的传播。