WHO monitoring new coronavirus variant named Mu

The World Health Organization has added another version of coronavirus to its list of “variants of interest” amid concerns that it may partially evade the immunity people have developed from past infection or vaccination.

The Mu variant, also known as B.1.621, was added to the WHO’s watchlist on 30 August after it was detected in 39 countries and found to possess a cluster of mutations that may make it less susceptible to the immune protection many have acquired.