It's not clear, and it depends on how long COVID is defined, but maybe 10-20% of diagnosed cases, if Omicron is same as previous strains. That's potentially a LOT.

— Tara Moriarty (@MoriartyLab) January 4, 2022

No. Omicron will not have nearly the Long Covid rates as Delta and earlier variants. I’d guess about 90% fewer.

Even “Long Covid” will turn out to be “Medium Covid” for most cases. The vast majority of people will recover fully in a year or two, as is the case with “Long Flu.” I think “Long Covid” is real, but not nearly as bad as folks want it to be.