A new COVID-19 variant, NB.1.8.1, is now emerging in the United States after becoming dominant in China and causing a significant rise in cases across Asia. U.S. health officials, including the Centers for Disease Control and Prevention (CDC), are monitoring the variant closely as scientists continue to analyze whether NB.1.8.1 poses greater risks in terms of transmission, severity, and resistance to existing vaccines. The variant was initially identified in Asia, particularly in Ch