Your odds of banging a chick with AIDS in the USA is 1 per 1000.
If you happen to have vaginal sex with this chick, your odds of catching AIDS is 1 per 2000 without a rubber. This assumes you do not have active herpes and shit like that.
So. 1000 x 2000 = 1/2,000,000
Check out getting killed by lightning or car accidents.
Do not doubt me. Have fun tonight.