Surge testing is being utilized in components of the UK to assist management the unfold of recent variants from Brazil and South Africa.
The Kent variant is now essentially the most generally discovered pressure of Covid-19 within the UK and it is extra simply unfold than the primary variant, which arrived in Spring 2020.
Scientists are taking a look at tweaking the coronavirus vaccines to verify they proceed to be extremely efficient.
However the place are these variants coming from? And why do viruses mutate?
Well being correspondent Laura Foster explains.