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Moderna加強疫苗 可對抗變體新冠病毒
3 years ago
6
2021年5月6日
根據5月5日發布的報告:專門針對南非變種病毒開發的Moderna增強疫苗,可以對抗該菌株以及起源於巴西的變種。而且,來自第二階段研究的數據顯示:增強劑在南非變異B.1.351中產生了更多的抗體。
Moderna首席執行官StéphaneBancel說:新數據使我們感到鼓舞,更加相信增強策略應能保護及對抗新發現的變體病毒。
在二期研究中,科學家還正在評估幾種其他變種的增強劑,新配方與原始疫苗在藥瓶中採取50-50混合液。與前兩劑方案不同,加強劑只需單劑注射。
原始疫苗接種後6至8個月,試驗參與者接受了加強免疫。在40名參與者中有37名,檢測到野生型病毒的抗體仍然很高;相對於在加強劑前,抵抗兩種令人關注的變異體B.1.351及起源於巴西的P1抗體均低,約有半數檢測不出抗體。然而,在注射原始疫苗或B.1.351特異性加強免疫後2週,所有參與者針對變體病毒的抗體均被加強。
公司報告稱:兩種加強劑量的耐受性良好。安全性及副作用與原始第二劑疫苗注射後的情況類似。多數不良反應為輕度至中度,最常見是注射部位疼痛。參與者還有發生疲勞、頭痛、肌肉痛和關節痛的症狀。
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