Ok guys...I don't know how many of you know, but I'm the person in charge of the immunizations clinic at my clinic. I routinely give, and have received 2 doses of the HPV Vaccine. I will post two links towards the end of my post that will give you official information on the vaccine itself.
Here is what I know. HPV affects about 80% of sexually active women, myself included. I was lucky in the respect that the cervical changes that HPV caused were caught before they could move into cancerous changes. I went through the necessary procedures to have it removed, and have been ok ever since. HPV is incurable. It is a virus that has many many (i think like 30+) different forms, some that cause cervical cancer, some that cause genital warts. There is not a type that does both. The vaccine (Gardasil is the trade name) protects against 4 different strains of the disease that cause cervical cancer. It does not protect against types of the vaccine that causes genital warts. The vaccine has been in research for 10+ years, and in human testing for around 6 years. The vaccine can not, i repeat can not, give you the virus. The vaccine does not contain the actual virus, but, from what i've been told, contains only the viral capsule that encases the virus. This enables your body to form antibodies against the disease without actually being exposed to it.
Now the obvious question is why would I get the vaccine if I've already had the virus? Because the likelihood of me being exposed to all four strains is slim to none. So, I may be carrying one strain (it goes dormant, but never truly goes away completely) but not the other three, so the vaccine would be effective for the other three. The only side effect that I've experienced from the vaccine is that it made my arm sore and a small knot formed under the skin where it was given for about 2-3 days. This is a normal side effect of any vaccine, not just Gardasil.
Anyway, I'm going to shut up now. Here are a few reliable links that you can use to find out more information about both the disease and the vaccine. Also feel free to PM/IM me anytime if you have ?'s. If I don't have the answer, I will find it for you.
Here is the link to the vaccine information statement for the vaccine itself...which i just saw that two of the hpv types cause both warts and cervical changes...my mistake.
http://www.immunize.org/vis/hpv.pdf
http://www.cdc.gov/nip/vaccine/hpv/hpv-faqs.htm
http://www.fda.gov/womens/getthefacts/pdfs/hpv.pdf
http://www.immunize.org/hpv/
http://www.niaid.nih.gov/factsheets/stdhpv.htm