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The H1N1 strain of influenza A is the predominant flu virus circulating in Beijing this season, health experts said, as the city grapples with a later-than-usual flu season that began emerging in December.
每年11月至次年3月是北方地区流感高发季节。以北京为例，今年高发期来得较晚，12月才开始逐渐进入流行季节。监测结果显示，本次流行的主要毒株为甲型流感H1N1型。
Li Tongzeng, a doctor with the infectious diseases department at Beijing Youan Hospital, said the flu, though often more severe than other respiratory infections, is self-limiting for most people with normal immune function and typically resolves within five to seven days.
北京佑安医院传染病科医生李侗曾说，虽然流感通常比其他呼吸道感染更严重，但对大多数免疫功能正常的人来说，流感是自限性的，通常在5到7天内就会消退。
However, elderly individuals, infants, pregnant women and obese individuals with weakened immunity face a higher risk of severe complications, Li warned.
李侗曾说，老年人、婴幼儿、孕妇、基础病患者、肥胖者等免疫力较低人群是感染流感病毒后发生重症的高风险人群。
Early use of antiviral drugs within 48 hours of symptom onset can shorten the illness, reduce severe complications and lower transmission risks.
在症状出现后48小时内早期使用抗病毒药物可缩短病程，减少严重并发症并降低传播风险。
Li said no new strains of respiratory infectious diseases have been identified so far.
李侗曾说，到目前为止还没有发现新的呼吸道传染病菌株。
Symptoms like dizziness, headaches, fatigue and muscle aches are common with respiratory infections, he added.
他补充说，头晕、头痛、疲劳和肌肉疼痛等症状是呼吸道感染的常见症状。
The Chinese Center for Disease Control and Prevention reported increased acute respiratory infections nationwide, including a rise in human metapneumovirus infections.
中国疾病预防控制中心发布全国呼吸道传染病监测情况，急性呼吸道传染病呈现持续上升趋势，其中，人偏肺病毒（HMPV）感染逐渐增多。
HMPV, a relatively new virus discovered in 2001, is being increasingly identified due to expanded monitoring efforts. The virus causes acute respiratory infections and can lead to bronchiolitis, asthma and pneumonia, particularly in infants, young children and those with weakened immune systems.
人乳头状瘤病毒是2001年发现的一种相对较新的病毒，由于监测工作的扩大，正在越来越多地得到确认。该病毒引起急性呼吸道感染，并可导致细支气管炎、哮喘和肺炎，特别是在婴儿、幼儿和免疫系统较弱的人群中。
"Symptoms of HMPV are similar to the flu, making it difficult to distinguish between the two without specific testing," Li said.
“HMPV的症状与流感相似，如果没有专门的检测，很难区分两者，”李侗曾说。
编辑：黎霈融
来源：中国青年报综合北京日报 CHINADAILY 中国疾控中心
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