The vaccine Gardasil protects against four ________ types.

A) human papillomavirus
B) herpes simplex
C) Chlamydia trachomatis
D) Treponema pallidum

Gardasil is a vaccine that protects against four types of human papillomavirus (HPV), including types 6, 11, 16, and 18. It is primarily used to prevent certain types of cervical cancer, as well as genital warts and other HPV-related conditions. Herpes simplex, Chlamydia trachomatis, and Treponema pallidum are all different types of sexually transmitted infections that are not protected against with the Gardasil vaccine.