This article was originally published on January 6, 2022, at https://www.npr.org. Written by Michaeleen Doucleff and Will Stone.
The variant looked wildly different from earlier versions of the coronavirus — and it quickly became clear that these mutations gave omicron an uncanny ability to sidestep our vaccines and spread very rapidly.
But it has taken longer to untangle what, if anything, sets an omicron illness apart from that of its predecessors. And most of all, does this variant cause less severe disease than the variants that have come before it?
With infections at all-time highs in the U.S., the clinical picture is now coming together and starting to confirm what other countries have found — a typical case of omicron not only presents slightly differently but also likely carries a lower chance of getting seriously ill.
