The World Health Organization has added the "mu" strain to its list of COVID-19 "variants of interest." The strain, also know as B.1.621, was first documented in Colombia in January 2021 but didn’t ...

(NEXSTAR) – The World Health Organization has identified another coronavirus variant that may have the ability to evade vaccine protections. The B.1.621 variant, also known as the “mu” variant, was ...

On Tuesday, the World Health Organization (WHO) said that it is tracking a new COVID-19 "variant of interest," and while the strain is nowhere near as widespread as other mutations, the organization ...

According to the Centers for Disease Control and Prevention, the mu variant is nowhere near as widespread in the United States as other COVID-19 strains. As of Thursday afternoon, the delta variant ...