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Pfizer, BioNTech say their Covid-19 vaccine is more than 90% effective

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Pfizer on Monday said its experimental vaccine was more than 90 per cent effective in preventing Covid-19 based on initial data from a large study, a major victory in the fight against a pandemic that has killed over 1 million people, roiled the world's economy and upended daily life.

[PARIS] Pfizer on Monday said its experimental vaccine was more than 90 per cent effective in preventing Covid-19 based on initial data from a large study, a major victory in the fight against a pandemic that has killed over 1 million people, roiled the world's economy and upended daily life....

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