(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 ...

The mu variant is the fifth variant strain to earn the title of "variant of interest" from the WHO. Among the other variants tracked by the WHO is the delta variant — a mutant strain proven to be more ...

With summer travel at an all-time high, new COVID-19 variants are brewing. Officials at the World Health Organization (WHO) recently added another one to its list of variants under monitoring: XFG.

Lambda: Lambda or C.37 was designated a WHO Variant of Interest in June. The CDC doesn't mention it. Mu: Mu or B.1.621 caused a flurry of fear when it was declared a WHO Variant of Interest in August, ...

This latest iteration of the coronavirus has quietly but steadily established a foothold across Europe, the Americas, and the Western Pacific, prompting health authorities to closely monitor its ...