纽时:《细胞》期刊揭露 "长新冠"4成因
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纽约时报报导,「细胞」期刊(Cell)二十五日刊载的一份研究显示,已发现有四种因素与所谓「长新冠肺炎」(Long
COVID)有关,倘若进一步研究能证实此一结果,或许有助于「长新冠」的预防与治疗。
「长新冠」係指新冠患者感染后四週仍持续有症状。根据西雅图非营利生物医学研究组织Systems
Biology,有四种因素与「长新冠」有关,首先是确诊者感染初期血液中的冠状病毒RNA浓度,这可以做为病毒量指标;第二,体内存在有会错误攻击身体组织的特定抗体;第三是人类疱疹病毒第四型(Epstein-Barr
virus)的再活化,这种病毒会感染大多数人、特别是年轻人,之后会变得沉寂;第四是罹患第二型糖尿病。
此外,路透报导,美国疾病管制暨预防中心的一项研究显示,Omicron变种病毒株造成的重症患者人数比前几波变种病毒要少。和去年冬天相比,因感染Omicron而送进加护病房的人数少二十九%;和上一波的Delta变种病毒相比,则少了二十六%。研究认为,此一结果有可能是民众普遍接种疫苗、高风险族群施打加强剂,以及先前的感染让体内拥有抗体三项因素导致。
至于英国伦敦帝国学院的一项研究指出,英格兰的Omicron变种病毒株疫情盛行率在今年一月达到高峰,一月五日到二十日的盛行率为四.四一%,是去年十二月的三倍多。世界卫生组织二十五日则警告,下一个出现的变种病毒传染力会比Omicron更强,但是否会变成致病性更温和的病毒株则有待观察,「我们希望这样,但不能保证」。
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