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July 22, 2021
Uncategorized

變種病毒盛行 專家:秋天或需打第3劑疫苗

隨著最早在印度出現的Delta變異病毒株目前持續在全球快速傳播,公衛專家表示,今年秋天很可能需要施打新疫苗追加劑,也就是第三劑疫苗,專家建議各國政府最好現在就著手準備。

部分國家,像是美國和英國已經表示,一年內推出施打追加劑(第3劑)的計畫,但目前尚未有具體方案。

由於不知道打過疫苗後免疫力能持續多久,公衛專家對於到底是否需不需要打第3劑,還存有問號。是否該施打與原始接種不同廠牌的疫苗,以及新冠疫苗是否需要和流感疫苗一樣,進行調整以應付變異病毒株,也存在未知數。追加劑計畫有可能在最初的疫苗施打計畫完成前就需要展開。

目前英國有近60%的成人完成接種,美國約逾55%。英國廣播公司援引政府高階人士報導,追加注射的計畫將在「適當時機」宣布,目前正在對不同疫苗混用的效果,進行廣泛研究。

英國5月啟動追加劑研究,看7種不同的疫苗作為第3劑的效果,結果預計9月公布。

不過,在許多開發程度較差地區,因無法取得疫苗而使得疫苗接種進度落後之際,推動注射追加劑,具有道德疑慮。世界衛生組織(WHO)已敦促較富裕國家,先向貧窮國家捐贈疫苗。

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