Pfizer’s top scientist has dismissed criticism that the company is pushing the widespread administration of Covid-19 booster shots too aggressively and denied it should have developed a more potent jab to stave off “breakthrough infections”.
辉瑞(Pfizer)首席科学家驳斥了外界关于该公司过于积极推动广泛接种新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）加强针的批评，并否认该公司本应开发一种效力更强的疫苗来抵挡“突破性感染”。
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