I think a lot of guys don't know that newly infected guys have a 26x or so greater chance of infection than after the initial 12 week period. For circumcised tops this raises their average risk of infection from 1/900 to 29/1000 (~1/34) which is twice as high as the probability of a raw bottom being infected when he is cum in by an HIV+ top not on medication. For one thing, these probabilities have effectively been suppressed so while the information is out there it isn't common knowledge. The other question is how many newly infected people know that they are infected while still in the acute infection phase? Fuck flu symptoms vary and apparently some people don't really experience serious fluish symptoms.