Wealthy countries are finalising plans to roll out coronavirus booster programmes to counter the threat from waning vaccine immunity, decisions that will further squeeze the supplies available to the developing world.
富裕國家正在敲定推出冠狀病毒加強(qiáng)疫苗的計(jì)劃,以應(yīng)對(duì)疫苗免疫力下降帶來的威脅,這些決定將進(jìn)一步擠壓發(fā)展中國家的可用供應(yīng)。
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