What do you mean by this? Was it a blazingly fast positive result on a home test? Because that's what I had when I tested positive last week. I didn't even have a chance to walk away from the test to wait the 15 minutes before the pink line blasted into view.
That’s exactly what I mean. Crap lit up like a Christmas tree brighter than the control line in about a second. My seven day antigen took about 2-3 minute to get bright enough to convince myself it was still positive.