my move for covid was the same as it is for flu/colds in general. lay on a couch/in bed, take symptom suppressing medication, vitamins, drink lots of fluids, eat slowly when hungry, take steamy showers 1-2x a day, and be unconscious for as much as possible.

fighting off infection takes a lot of energy. maintaining a slight fever comes with a significant metabolic cost, so don't be trying to do shit unless it's absolutely critical. the reason you feel like trash is evolutionary: your body is busy, please try your call again later.

just stay in larval mode until you don't have a temp anymore. if you get bored or want a brain escape, watch dumb movies/tv you have seen before which require minimal think thoughts.