http://www.newsweek.com/delta-covid-variant-dominate-despite-mu-resistant-study-japan-1627818

A preliminary study highlighting the potential resistance of the Mu COVID-19 variant to antibodies has been released as scientists continue to keep an eye on the mutant virus.

The study, published by researchers at the Institute of Medical Science at the University of Tokyo and other Japanese institutions, compared Mu to other variants of COVID-19 to observe how they reacted to human defences, either by natural immunity due to a previous infection, or to vaccine-induced immunity.