You know what’s funny. I had it and I always tested negative. I know I had it because I passed it on. Felt all the symptoms. One Indian doctor told me that she believed based on my condition. That I had it. But my body was fighting it so well that there was very little trace to identify it on a test. Never have gotten it again sense then. We got exposed at work at the start of the spread. I was a LEO. Many of my coworkers got it and some even passed away from it (at the hospital ).