a WHO report, the mu variant shows signs of evading COVID-19 vaccine protection.RELATED: COVID-19 lambda variant: What to know about the coronavirus strain"The Mu variant has a constellation of mutations that indicate potential properties of immune escape," the report said.
WHO officials said the mu strain has appeared in 39 countries with sporadic outbreaks in South America and Europe. However, the strain makes up less than 0.1% of COVID-19 cases worldwide.
WHO defines variants of interest as those COVID-19 strains having the potential of affecting the virus’ transmissibility, and disease severity and could be responsible for outbreaks or surges in cases in multiple countries over time.