Personal experience:
Wife got covid and was laid out for 4 days to sick to do anything and she is a trooper. She lost most of her sense of taste, small and appetite for a month. I was in a hotel room with her, we were working on a project together.
I take vitamin D, she does not. 6 days after she was first ill, I experienced a mild fever and was feeling a bit off. It lasted two hours, then I forgot about it and felt fine. Was back to full energy by lunch.
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