What to know about the COVID variant that may cause 'razor blade' sore throats

A new COVID-19 variant, NB.1.8.1 or "Nimbus," is spreading globally, causing painful sore throats, dubbed "razor blade throat." Primarily affecting the eastern Mediterranean, Southeast Asia, and western Pacific regions, it's been detected in the US. While some Western Pacific countries report increased cases and hospitalizations, current vaccines remain effective, and the WHO considers the public health risk low.