Pfizer vaccine was only just 12% effective against O virus
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New York health officials found the effectiveness of Pfizer's vaccine versus Covid plummeted from 68% to 12% for children ages 5 to 11 during the omicron surge.
枫下家园 / 医药保健 / Pfizer vaccine was only just 12% effective against O virus
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New York health officials found the effectiveness of Pfizer's vaccine versus Covid plummeted from 68% to 12% for children ages 5 to 11 during the omicron surge.