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Moderna president: Our vaccine ‘is 94.5% effective’ against Covid-19

Moderna has said its vaccine provides strong protection. Its vaccine appears to be 94.5% effective, according to preliminary data from the company's still ongoing study in 30,000 volunteers. Exactly a week ago, competitor Pfizer Inc announced its own Covid-19 vaccine appeared to be similarly effective -- news that puts both companies on track to seek permission within weeks for emergency use in the US.

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