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New variants of coronavirus are emerging that are more infectious than the original one that started the pandemic.

Scientists are urgently studying these mutated versions to understand what threat they pose.

What are these new variants?

Experts’ concerns currently focus on a small number of new variants of coronavirus:

A UK variant that has become dominant in much of Britain and has spread to more than 50 other countriesA South Africa variant that has also been found in at least 20 other countries, including the UKA new variant from Brazil