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doug asks:

How long after having sex will the virus show up. If I have been having sex with someone for 6 months is it possible that I gave it to her?

The answer to your question is not known.  It is not known what the ‘transmission efficacy’ of HPV is.  That is, we do not know the rate by which people actually get an infection for each exposure to the virus.  This is in contract to other sexually transmitted microbes, where an exposure often results in infection.  There is another unknown about HPV infections to complicate matters. If an HPV shows up at a later time, it is not clear whether this HPV infection is new or a reactivation of an old HPV infection. We have a lot yet to learn about HPV.  To reduce your and your partner’s risk of getting HPV, see the assessing your risk section of our web site, www.cervicalcancercampaign.org/ccfacts/risk.html.

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