美國下令停止Vaxart口服疫苗中期試驗

美國命令Vaxart停止新冠疫苗中期臨床試驗招募工作

美國生物技術公司Vaxart於周三宣布,接獲美國政府命令,停止其口服新冠疫苗中期臨床試驗的篩選及新參與者招募工作。這使Vaxart成為多間因政府終止資助而被迫停止疫苗研發的生物科技企業之一。

Vaxart表示,雖然將停止新參與者的招募,但會繼續監察已經參與試驗的受試者。此舉是美國衛生與公共服務部(HHS)旗下生物醫學先進研究與發展局(BARDA)決定逐步縮減mRNA疫苗研發活動的一部分。

BARDA在疫情期間曾向多間疫苗研發公司提供數十億美元資助,協助開發針對公共衛生威脅的醫療物資。此次縮減行動是由現任美國衛生部長羅伯特·F·肯尼迪(Robert F. Kennedy Jr.)推動,他長期質疑疫苗安全性,並正大幅調整美國在疫苗、食品及藥物政策上的方向。

肯尼迪指出,終止相關疫苗計劃的原因是「數據顯示這些疫苗未能有效防護上呼吸道感染,如新冠病毒及流感」,但未提供具體的科學證據支持此說法。

Vaxart的疫苗研發項目獲得的資助總額高達4.53億美元,包括先期提供的6,570萬美元,以及視研究進展而定的最高3.87億美元里程碑付款。這些里程碑款項需由BARDA評估研究是否可以繼續進行後決定。

評論與分析:疫苗研發資助縮減背後的深層意義

這次美國政府叫停Vaxart新冠疫苗試驗,反映出美國衛生政策的重大轉向,尤其是在疫苗研發領域。肯尼迪部長的質疑和政策調整,雖然缺乏公開的科學佐證,但無疑將對疫苗產業和整體公共衛生策略帶來深遠影響。

首先,停止mRNA疫苗的研發資助,可能是基於對現有疫苗保護效果的重新評估,尤其是對上呼吸道感染的防護能力不足。然而,這種大規模撤資和政策轉向,若沒有透明且嚴謹的科學論證,容易引發公眾對疫苗安全性和效用的疑慮,甚至可能影響疫苗接種率和疫情控制。

其次,Vaxart的口服疫苗研發本身具有創新價值,口服疫苗相較注射疫苗更易於普及和接受,對全球疫苗接種策略具潛在積極意義。政府的突然撤資,可能削弱這類創新產品的推廣,阻礙多元化疫苗技術的發展。

最後,從更宏觀的角度看,這次事件揭示了公共衛生政策與政治因素交織的複雜性。疫苗政策不僅是科學問題,更牽涉到政治意識形態、公共信任和資源分配。未來政府在調整相關政策時,必須平衡科學證據與社會信任,避免因政策不透明而引發更大社會不安。

總結來說,這次Vaxart疫苗試驗被迫停止,既是美國疫苗政策轉變的縮影,也提醒我們在疫情後時代,如何在科學、政策與公眾信任間找到新的平衡點,將是全球公共衛生面臨的重要挑戰。

以上文章由特價GPT API KEY所翻譯及撰寫。

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