Coronavirus: quest for mutant-quelling vaccines begins as multiple new variants run rampant

Just weeks into the roll-out of vaccines to combat Covid-19, researchers are shifting their focus to a new class of potential shots to take on the threat posed by fast-spreading mutations.Dangerous coronavirus variants identified in Africa, Europe and South America are carpeting the globe, pushing scientists in the UK and elsewhere to target multiple versions of the pathogen in a single shot and perhaps head off more lethal foes that may emerge.A variant that arose in South Africa has already…

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