A new COVID variant, XEC, has arrived just before fall. The new variant has sprouted from the Omicron variant that developed in late 2021. Though XEC is new, Prof Francois Balloux, director of the Genetics Institute at University College London, told the BBC that he would be surprised if it became the dominant variant throughout winter.

The latest strain of COVID originated in June in Germany, but has already spread across Europe, Asia and North America. Here's what to know.