The Centers for Disease Control and Prevention said Friday it is tracking a new variant of concern dubbed XBB.1.5. According to new figures published Friday, it estimates #XBB15 makes up 40.5% of new infections across the country. XBB.1.5's ascent is overtaking other #Omicron variant cousins BQ.1 and BQ.1.1, which had dominated a wave of infections over the fall. Scientists believe its recent growth could be driven by key mutations on top of what was already one of the more immune evasive strains of Omicron to date. Via cbsnews • Riemoh