The World Health Organization is expected to say an Omicron-targeted Covid-19 vaccine dose can be administered as a third shot in order to broaden immune responses in the face of a virus that is “likely” to continue to evolve.
世界衛生組織(WHO)預計將表示，針對奧密克戎變種的新冠疫苗可以作為第三針注射，以擴大面對這種“可能”繼續進化的病毒的免疫反應。
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