People most vulnerable to Covid-19 could require a booster of the BioNTech/Pfizer vaccine later this year, according to scientists who said the shot elicited a lower antibody response against the Delta variant first identified in India.
科学家表示,最易感染新型冠状病毒肺炎(COVID-19,即2019冠状病毒病)的人群可能需要在今年晚些时候打一针BioNTech/辉瑞(Pfizer)疫苗的加强针。他们表示该疫苗对首先在印度发现的Delta变体产生的抗体反应较低。
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