It says in the book how many healthy people were tested HIV positive but never developed AIDS. As long as the person isn't taking drugs (prescription and nonprescription) and following a healthy lifestyle, they are expected to do fine.
well,,, i think there is tiny bit more to this,,, peopel who test positive may or mayb not be immune system challenged people, so to be and stay health,,, extra precaution should be taken by those who did test positive.