Britain’s Vaccine Chief Says World Faces 4,000 COVID-19 Variants

The head of Britain’s vaccination deployment effort says the world faces around 4,000 variants of the virus that causes COVID-19. As a result of new mutated versions, vaccine manufacturers are looking for ways to improve the shots to resist the virus variants, Vaccine Deployment Minister Nadhim Zahawi said Thursday. British researchers plan to test a mix of two vaccines […]

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