Q&A: What is the Mu Covid-19 variant and should we be worried? 

A pedestrian walks past a supermarket with Covid-19 and social distancing warning posted.

What is the Mu variant of Covid 19?

The Mu or B.1.621 variant was added to the World Health Organisation variants of interest list in recent days. It originated in Columbia where it now makes up 39% of cases. The WHO is monitoring this because of emerging evidence it can evade immunity provided by vaccines and antibodies.