(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 ...

(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 ...

As children head back to school across the country, a new Covid-19 Mu variant is emerging and has been detected in nearly every state. NBC News senior medial ...