Variants raise COVID-19 questions, concern ...United Arab Emirates

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Variants raise COVID-19 questions, concern
Paris: Several coronavirus variants with the potential to be more transmissible have caused global concern over whether existing vaccines will still protect the world from a virus that is constantly mutating. Here is what we know. How many variants? Viruses continually mutate as tiny errors are introduced each time they replicate. The SARS-CoV-2 virus is no different, and has already undergone several thousand mutations since it emerged in humans in late 2019. Of the current known variants, three are particularly worrying: those initially detected in southeast England, South Africa and Brazil. There is also another group of variant strains that are currently being studied in vitro, but aren

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