武漢肺炎病毒現時的主流品種為D614G,一道較為簡易的說明方法就是原來的D614品種變異成為G614品種。419Please respect copyright.PENANAOfZWd21BPD
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而根據GISAID公開資料庫記錄,G614品種最先在1月24日的四川病毒樣本出現。419Please respect copyright.PENANAwlG8jpEE8X
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(圖2)何解G614品種能夠成為主流,一直是科學家想解答的問題。419Please respect copyright.PENANASho6najcXc
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之前所獲得的實驗數據,大多是從病毒一小段的部份、或者是合成病毒獲取結果,沒能百分百反映現實。419Please respect copyright.PENANAxRkks8FznO
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直至最近,才有科學家利用真實存在的武肺病毒進行實驗。419Please respect copyright.PENANAlTvjE0JKbo
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(圖3)在研究中(Ref1),科學家將D614品種及G614品種以1 : 1的比例從倉鼠的鼻孔注入其體內。419Please respect copyright.PENANA5TnPms46aE
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如果最終G614品種/D614品種的比例大於1的話,亦即是代表G614品種在繁殖方面比D614品種更為優勝。419Please respect copyright.PENANAnhgkFZUaf8
419Please respect copyright.PENANAv4ZNJumv1B
(圖4)倉鼠受病毒感染7日後,鼻孔、氣管及肺部個別區域的G614品種/D614品種均大於1,顯示G614品種在上述區域有著較佳的繁殖優勢。419Please respect copyright.PENANAGAKSh1SBf3
419Please respect copyright.PENANA8UqG3n3DJ9
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同時在實驗室的人體肺部細胞中,就算用上D614品種及G614品種以9 : 1的比例方式感染,G614品種/D614品種在其後感染日子均呈大於1的狀態,更進一步顯示G614品種的繁殖優勢。419Please respect copyright.PENANAoUfk8M5mLi
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(圖5)科學家同時亦發現,G614品種的病毒在各種溫度上均比D614品種相對為穩定。419Please respect copyright.PENANAwhqVBCyz65
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不過好消息是,對抗D614品種的抗體,其對抗G614品種品種效率並無任何損傷。419Please respect copyright.PENANAGVmmKdXBtc
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這亦即間接顯示出以D614品種作原材料的疫苗,其產生的抗體亦能有效對抗G614品種病毒,而事實上現今亦有疫苗是利用G614品種作原材料,奈何是鄰國出品。419Please respect copyright.PENANAkSHF7Nq1mg
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(圖6)至於近來在挪威發現的新變種M439K品種,基於是新發現的關係,現時醫學界及學術界均無任何學術文章作詳細研究其特性。419Please respect copyright.PENANAwgtKu9ekuA
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莫論病毒變種與否,只需一個乞嗤,病毒就已經不需近距離接觸,便能透過體液傳播至他人。419Please respect copyright.PENANA7OBqCsyo13
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將「新變種」及「不需近距離接觸」串連在一起的報導手法,有著混淆視聽的成份,並不可取。419Please respect copyright.PENANAUCSbrxjXfY
419Please respect copyright.PENANAfp9tUsXGPk
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。419Please respect copyright.PENANABWjeROtPSd
419Please respect copyright.PENANAu5OeDS6sv8
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc419Please respect copyright.PENANAlcGo5kn6nD
419Please respect copyright.PENANAnypmm5vv7G
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。419Please respect copyright.PENANA6282JkmO9j
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Link:419Please respect copyright.PENANAPBYLCR3IP3
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio419Please respect copyright.PENANApkvSI7V7x8
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419Please respect copyright.PENANA8UmYzvT4ry
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。419Please respect copyright.PENANAc3BBLySHvP
419Please respect copyright.PENANAWaJgrwIYs1
https://www.instagram.com/potatopigtongue/419Please respect copyright.PENANAXTNEiuZYsH
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Ref1:https://www.nature.com/articles/s41586-020-2895-3419Please respect copyright.PENANAU1L6pYliiU
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #91
深入淺出–武漢肺炎病毒D614G變種
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