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789
新冠肺炎疫情持续,美国蒙大拿州有专家于周三发表研究报告,指新冠肺炎病毒可在某些物体表面存活3天。
团队将实验结果与严重急性呼吸系统综合症(SARS)病毒的结果比较,发现两种病毒在空气中及物体表面的存活时间相似。
专家在美国国家卫生研究院洛矶山实验室用喷雾装置模拟新冠肺炎患者咳嗽及打喷嚏的情况,从而将病毒释放到空气中。结果发现,病毒可在气溶胶上存活3小时,气溶胶即是在空气中悬浮的颗粒物。
而病毒可在铜质表面上存活4小时;在硬纸板表面上存活24小时;在塑料及不锈钢表面存活2至3天。
专家指,结果并没证明病毒会透过接触气溶胶及物体表面来传播,只是理论上有这个可能。而勤洗手、不要用手触摸脸部是很重要的防疫措施。使用稀释漂白水来清洁物体表面亦可去除病毒。
研究报告已在医学类预印本杂志《medRxiv》上刊登,但它尚未出版及未被评审。
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