The more people who get Covid-19, the more variants will emerge, some of which may not be stopped by our current vaccines.  As Prof Turi King of the University of Leicester explains, there's a race on. 

Professor Turi King is the Professor of Public Engagement and Genetics at the University of Leicester. She is best known for establishing the bones found in a Leicester car park in 2013 belonged to King Richard the Third.

Transcription at https://www.expressivemindsmedia.com/transcript/