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Pfizer Inc and BioNTech SE launches clinical trial to test new version of vaccine specifically designed to target Covid-19 Omicron variant

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(G.N.S) Dt. 25 Covid-19 infection vaccine manufacturing companies-Pfizer Inc and BioNTech SE have said that a clinical trial has begun by them to test a new version of their vaccine specifically designed to target the Covid-19 Omicron variant, which has eluded some of the protection provided by the original two-dose

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