Coronavirus variants: are they really more deadly? Here's what we know so far

One certainty during a pandemic is that the virus will mutate. SARS-CoV-2, which causes COVID-19, is no different. But how concerned should we be about the new variants of the virus that are arising in places such as the UK, South Africa and Brazil? Are they more lethal or more transmissible than the original virus?

In the UK, for example, Prime Minister Boris Johnson recently claimed that the new variant may…

© La Conversation - mercredi 27 janvier 2021