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.
全球已為成年人接種逾10億劑新型冠狀病毒肺炎(COVID-19,即2019冠狀病毒病)疫苗,現在辯論正在轉向一個有爭議的問題:是否或何時應該為兒童接種新冠疫苗?
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