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香港流感活跃程度近来持续下跌

2017-08-21 04:11:32   中国青年网

本报香港8月20日电 (记者连锦添、陈然)香港卫生署卫生防护中心19日表示,最新监测数据显示,香港夏季流感活跃程度7月中升至高峰后下降,大部分指标如化验室监测、流感入院个案等数字在过去一个月持续下跌。本季至今录得的成人严重和死亡情况没有出现异常变化,个案数目高于2016年冬季流感同期,但低于2015年冬季流感同期。该中心预期香港流感活跃程度在未来数周会继续下降。

香港卫生署卫生防护中心8月9日及16日发布的新闻稿已指出,香港季节性流感活跃程度及公立医院流感入院个案数字在过去数星期持续下跌。

香港卫生防护中心总监黄加庆医生对本报记者解释说,从中心收集的呼吸道样本来看,季节性流感病毒阳性百分比在7月9日升至40.86%的高峰,然后于7月30日至8月6日间从25.36%下降至17.96%。

黄加庆表示,香港这次夏季流感相关入院个案的死亡比例至今没有异常增加,需入住公立医院的流感病人的死亡比例低于2.5%,与过往流感季节比例相若(介于1.9%至3.3%之间)。另外,由于流行性感冒是常见传染病,大部分流感病人会在2至7日内自行痊愈,只有小部分病人需入院接受治疗。

香港卫生防护中心经分析认为,香港本次夏季流感情况特殊,主要有几项因素。首先,在H3病毒流行的季节,老年人口的严重和死亡个案发生率会远高于H1病毒流行的季节;其次,香港老年人口不断增加,以致感染流感、出现并发症甚至死亡的个案较多;其三,老年人口在2016年底接种冬季流感疫苗后,疫苗保护力在夏季逐渐下降,使他们较易受到感染。

香港卫生防护中心也提醒市民和旅客,无论在本地或外游期间都应注意良好的个人和环境卫生,以防感染流感及其他呼吸道疾病。

香港卫生署重申,季节性流感与严重急性呼吸系统综合征不论在病原、临床病征、严重程度、传播力、治理和预防方法等均有不同,不宜作比较。关于今年夏季香港最新的流感情况,香港卫生署卫生防护中心一直根据恒之有效的机制与国家卫生计划生育委员会,广东省卫生和计划生育委员会,澳门卫生局互相通报及紧密联系。

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