
Omicron, the variant that has dominated Covid cases since Thanksgiving of 2021, isn’t done with us yet, it seems. The latest subvariant of Omicron sweeping the country, XBB.1.5, is moving fast. It now accounts for 70 percent of Covid cases in the New York City area and more than 40 percent in the United States. Here’s what you should know about the latest alphabet soup variant.