EU Commission President Ursula von der Leyen tweeted that her office 'has just approved a contract for a guaranteed 900 million doses' with the same amount of ...
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Une seule dose de vaccin Pfizer ou AstraZeneca permet de réduire la transmission du coronavirus jusqu'à près de moitié au sein d'un même foyer, où le ...
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Britain broke its record for the most coronavirus shots given out in one day Friday and almost half of all adults have received one dose
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Researchers find vaccine roughly as effective against Brazilian variant as it was against other, less contagious versions of virus
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Researchers say that, based on their trial, which involved about 20,000 people in Russia last fall, the vaccine is about 91 percent effective in preventing ...
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