New Covid-19 variants that make the virus more contagious and could render vaccine and antibody protection less effective have spread rapidly across dozens of countries, the World Health Organization...
source https://www.ndtv.com/world-news/uk-covid-variant-in-70-countries-south-african-strain-in-31-who-2359007
source https://www.ndtv.com/world-news/uk-covid-variant-in-70-countries-south-african-strain-in-31-who-2359007
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