I had a persistent dry cough with no mucus back at the end of January that just wouldn't go away. I was over it a few days with prednisone. I wonder if that was it because it was a weird cough in that it didn't make me miserable so much as it was just inconvenient and wouldn't go away. They weren't testing for Corona back then. I should add that I'm immunocompromised and it really wasn't major.