Did my due diligence prior to posting and found the thread about Katie Jane having mono from this spring. Lots of good info, but I think there's enough difference to warrant a new thread. Zach tested positive for mono late last week. In addition to that, his white blood cell count was low. We've had the blood work redone and we are waiting on the results. Our complicating factor is that Zach has an EXTREMELY high pain tolerance and never complains about being uncomfortable. He has had severe strep infections in the past and when we finally figure out what's going on, he says, "Yeah, my throat was a little scratchy". We found out via research today that there are two tests you can be Positive for for mono. One is a positive test that you've had it in the past and two is the positive for an active virus. We're not sure yet which version Zach was positive for. All I know for sure is that he's not as wiped out as I would expect him to be. What I don't know is what to attribute that to: either his high pain tolerance or the maybe that he tested as positive for having it in the past. We were also told that getting a flu shot can "reactivate" the mono virus. Can anybody confirm or deny this? TIA. UPDATE: White blood cell count is on the low end of normal, but platlettes are low. We have an appointment on Friday morning.