Everyone knows the names of the major COVID variants Alpha, Delta, and Omicron. But last year, viral evolution shifted, muddying the waters as well as the names of the major variants. Instead of spawning new variants, COVID began evolving within Omicron itself—at a breakneck pace, no less. The organization responsible for figuring out what to call the latest variants of concern—the World Health Organization—stopped using Greek letters after Omicron, arguing that all the new variants weren’t different enough to warrant nicknames.
Do you remember the previously ubiquitous COVID strains BA.4, BA.5, or BQ.1.1? Have you heard of the currently surging XBB.1.5, and do you understand what the tangle of letters and numbers mean? You probably don't—and some experts say it's because of the names. You could be forgiven for thinking another strain of Omicron poses no new threat—especially if you’ve already had Omicron or received the new Omicron booster.
