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我国北方流感仍处于极低水平

2017-08-09 15:15:15   中国青年网

本报讯(记者贾晓宏)最近香港特区严重的流感疫情引发关注,中国疾控中心昨天表示,目前北方省份流感活动处于极低水平,南方省份夏季流行高峰总体高于往年同期,自6月中下旬开始,A(H3N2)亚型流感为主要流行毒株。近期南方省份流感确诊住院与死亡病例未见明显增加。近一周,我国南方地区和香港特区流感流行水平已开始回落。

中国疾病预防控制中心国家流感中心对近期我国内地流行的A(H3N2)亚型流感病毒进行基因特性分析结果显示,未发现可导致疾病严重程度和疫苗匹配性改变的病毒基因位点突变的情况。全国流感病毒抗原性分析也提示,病毒未发生明显的抗原性变化。

我国北方季节性流感通常有一个冬春季流行高峰,但南方季节性流感有两个流行高峰,即冬春季和夏季。目前我国南方省份夏季流感流行高峰导致的重症与死亡病例未超出既往水平。

预防流感或流感严重并发症的最有效方法是接种流感疫苗,孕妇、5岁以下婴幼儿、老人及患有慢性基础性疾病的人群可优先接种流感疫苗。奥司他韦等神经氨酸酶抑制剂对绝大部分流感病毒敏感,且在感染早期(症状出现后48小时内)给予抗病毒药物可有效减少严重的流感并发症和死亡;建议临床对于容易发生并发症的高危人群尽早使用抗病毒药物治疗。 J146

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