新冠肺炎疫情全球爆发,病毒的传播途径成为医学界的调查焦点。美国《纽约时报》上周六(4日)报道,来自32国共239名科学家联署公开信,表示有证据显示新冠病毒可经空气传播,促请世界卫生组织(WHO)检视其现行指引。世卫此前主张,新冠病毒是经由飞沫传播。
《纽时》报道指,该批科学家在公开信中表示,新冠病毒除了可以经病人打喷嚏、咳嗽、讲话而产生的较大飞沫粒子传播外,亦可依附在呼气产生的较小粒子上,于空中停留飘扬,民众有可能因吸入而染疫。报道指,有关研究和证据将于下周刊登于学术期刊之上。
不过,报道同时引述世卫传染病预防和控制部门技术负责人阿莱格兰兹博士反驳,新冠病毒可经空气传播的说法仍未有足够证据支持。
她称︰“我们尤其在最近几个月,曾多次表明有考虑空气传播的可能性,但该主张肯定仍未有确切或清晰的证据支持。”
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