Gardasil is a series of three shots that are given over a period of months (8 mo. is the recommended period). Full protection isn’t achieved until the entire series has been given. It isn’t a last minute decision. That is why it should be given before sexual activity begins. The claim it wears off in 5 years is unfounded. Gardasil only has studies for 5 years of protection. It is not yet known how long the vaccine offers protection. The vaccine may protect for life or require a booster shot.