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香港流感引关注 专家:与SARS无可比性 无须惊慌
2017-08-09 05:35:59 中国青年网
“小变异,无证据引起重症或死亡”
据媒体报道,香港大学微生物学系讲座教授袁国勇与名誉助理教授龙振邦查阅文献发现,香港此次的流感并未出现抗原漂移,但有小抗原变异(N121K),导致此前的疫苗失效。这可能是导致今次流感高峰的原因之一。
“N121K变异”随即引人注目,宋铁指出,广东省从今年1月到现在,通过基因测序,没有发现香港提到的变异毒株。也有其他国家在去年针对该变异做研究,但并无证据显示该变异可引起流感重症或死亡。
他进一步说,今年广东科研人员对本地流感毒株进行研究,发现四个毒株发生了抗原表位中的氨基酸位点异变,包括N31S、D53N、192T、Q197H,没有N121K。而对于学者提到N121K可能导致疫苗失效问题,宋铁认为,在广东疫苗不存在问题,根据基因分析结果,广东流行的H3N2流感病毒,与现供疫苗株在基因进行树上,同源性高达98.6%~99.8%,不存在失效问题。
近期到香港,需要如何防范流感?
“少去人多之地,通风最关键”
“少到人员密集的地方,注意个人卫生,最关键之处是自然通风。” 宋铁指出,无论在粤还是在港,市民在公共场所还是在家中,都需要注意自然通风换气,降低流感聚集性疫情发生的风险。他提醒,在流感高发季节,每天应确保办公场所自然通风至少两次以上,每次开窗通风15~30分钟,出现流感样症状的员工应注意个人卫生防护,减少传播风险。
宋铁特别提醒,年幼、体弱、孕妇、老人、有基础疾病的人群,都是流感高危人群,每年要及时接种流感疫苗。
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