The XBB.1.5 COVID-19 subvariant — a new version of the Omicron variant — is sweeping through the United States right now amid a chaotic travel season and the early days of winter. Why it matters: Cases tied to the new variant nearly doubled over the last week, according to estimates from the Centers for Disease Control and Prevention.
https://www.axios.com/2022/12/31/xbb15-covid-variant-symptoms-new-england-omicron