|Jenner specifically told Rick that no one was affected when Rick was drunk...that was in the season 1 finale, so no it wasn't mentioned that anyone was carrying the virus outloud. Remember Jenner required everyone to submit to a blood test. I guess he didn't specifically say no one was affected. He said something like all clear when Rick asked him about it.|
I don't think he took the blood to test them for the "condition", he must have done so for something else.