ブースター接種の繰り返し、免疫系に悪影響の恐れ－ＥＵ当局が警告
Members of the public walk through the monitoring area after receiving a dose of the Covid-19 vaccine at a vaccination site inside a gymnasium in San Juan City, Metro Manila, the Philippines, on Tuesday, Dec. 28, 2021. Photographer: Veejay Villafranca/Bloomberg 欧州連合（ＥＵ）の医薬品規制当局は1…
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