With more than 1bn coronavirus vaccine doses administered to adults around the world, debate is turning to the contentious question of whether or when to extend vaccinations to children.
manbetx app苹果 已为成年人接种逾10亿剂新型冠状病毒肺炎(COVID-19,即2019冠状病毒病)疫苗,现在辩论正在转向一个有争议的问题:是否或何时应该为儿童接种新冠疫苗?
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