Had a rough flu this year, that was fever for 4-5 days, 5% energy, aches & pains, constantly cold then hot in bed/night sweats, heavy brain fog, among other symptoms. Maybe some of that lasted longer than necessary because I was still single-dad in there, but the 5 % energy really surprised me, an active and health focused individual otherwise and made me test for Covid twice, always negative. So far as I know otherwise, no Covid yet.