Pfizer has admitted it ‘engineered’ mutated Covid viruses in lab tests to ensure its vaccine and drugs remained effective against new variants – but the company denies the experiments posed a risk to the public.In a , the pharma giant finally responded to an undercover video that went viral last week in which a supposed director at the firm claimed the company was exploring 'directed evolution' research on monkeys to make the virus 'more potent'.Jordon Trishton Walker, who appears to have been a senior staffer in Pfizer's research and development division, was caught making the explosive claim in a sting by the right-wing activist group Project Veritas.
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