Gardasil is a vaccine which has been proven to prevent types of human papillomavirus, also known as HPV. Certain types of HPV have been known to cause cervical cancers, many other types of cancers, as well as 90% of genital warts cases. Gardasil can prevent these infections. It is recommended that this vaccine be taken before adolescence. The average cost of this vaccine is $120 for a single dose. Three doses are required over six months. Besides the $360, there is the cost of doctor’s visits to consider.