My question has to do with the probability of having an std. The immune system clears hpv in 90% of all cases in two years. Let's say someone's ex was diagnosed with hpv in 2002 and she had sex with someone in 2006. That would mean that person would have a 10% chance of having hpv. So my question is what is the probability of that person that she had sex with have hpv after 2 years?