And if you had read what I wrote, you would see that I stated that roughly 40% of all HIV + live in the south. The south does not constitute 40% of the US population, or heck, does it? So it can be skewed. What can not happen though is that the chance increasing that much. If anything it will decrease. Why?
That HIV population that the CDC states, again, this includes KNOWN and UNKNOWN would include prisoners and babies. The chances of you or I meeting a HIV prisoner is highly improbable, while it is technically not impossible, it ain't gonna happen.
I just looked something up because the CDC does have some wicked data. I was wrong. The South has 46% of all the HIV cases, not 40%. What is interesting is that GA has the highest rate in the US, followed by Florida, then followed by Louisiana. Heck, if I use the CDC data, here in CA, the chance of me meeting a HIV+ person is .0114%. Yes, barely more than one one hundredth of a percent. Then it can get even lower if I select OUT of meeting people who are black. Then it can get even lower if I select OUT of meeting men. Then it can get even lower if I select OUT of meeting people under 35.
Here is the math for you to ponder.
Assuming a normal distribution for age and geography (their data doesn't break it down well enough to figure out greater precision), the white female population that is HIV+ (known and unknown) is 2.58%. There are 1.2m cases. Again, this is WRONG and I know it, it will actually be lower, but for ease of math. there are approximately 31,000 white women with HIV in the US. Think about that! The CDC states that their model has 20% being HIV + and unknown. Want to assume that the HIV+ known will not fuck me? That leaves 6,200 women in the US, out of roughly 125 million women that are sexually active that have HIV and do not know it. Hmm. That puts the chance of me meeting that person at .0049% That means that I would need to meet over 20,100 women just to have finally met one. Fuck, that's beyond Wilt Chamberlain level :)
My point in all of this is actually very simple. Will condoms be effective in stopping HIV? FUCK YEAH. Will you meet someone who is HIV+ and fuck them? Highly improbable. So what are you protecting yourself from? If you, and that is the generic you, feel that condoms are going to protect you, are you this anal retentive about other things that you can control? HINT: Alcohol, tobacco, sugar, processed foods, not exercising, not sleeping, stress, bad diet, etc. It is, again, how people fail to judge risk well. However, if they give you peace of mind, that is a qualitative value that can not be measured. So go for it.
Here, let me fuck with your head some more. The chance of being struck by lightning in my lifetime is GREATER than the chance of me meeting that HIV+ unknown woman.