Roommate may have HIV!

Bella
Okay so my fiance and I's roommate who is a male, may have HIV. Hes engaged to my best friend. I know she didn't give it to him she was checked before him and has not messed around on him. We knew nothing of this. Us and some friends went to the plasma place and we dropped him off and went to a store. We came back 30 mins later and he was outside. I asked him what happened and first he wouldnt tell me then he handed me papers saying he was disqualified from donating plasma because he was reactive to HIV positive. Hes donated 4 times previously this month without problem but it can take weeks to a few months to pop up. Now we all have to be tested cuz.we're around him. My best friend is the one who really has to worry tho.