(CNN) — The naming of the new coronavirus variant Omicron is causing some confusion. Since May the World Health Organization has been using letters of the Greek alphabet, in order, to name coronavirus ...

Social media users correctly noted, however, that the organization skipped two letters in doing so, leading to questions about the move. Here's what we know about how omicron ended up with its name.

The 15th letter of the Greek alphabet had been a fairly innocuous entity for 2,500 years. But in just two weeks, it became notorious. Omicron moved beyond classical philosophy texts, beyond the realm ...