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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月是北方地區流感高發季節。以北京為例，今年高發期來得較晚，12月才開始逐漸進入流行季節。監測結果顯示，本次流行的主要毒株為甲型流感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.
北京佑安醫院傳染病科醫生李侗曾說，雖然流感通常比其他呼吸道感染更嚴重，但對大多數免疫功能正常的人來說，流感是自限性的，通常在5到7天內就會消退。
However, elderly individuals, infants, pregnant women and obese individuals with weakened immunity face a higher risk of severe complications, Li warned.
李侗曾說，老年人、嬰幼兒、孕婦、基礎病患者、肥胖者等免疫力較低人群是感染流感病毒后發生重癥的高風險人群。
Early use of antiviral drugs within 48 hours of symptom onset can shorten the illness, reduce severe complications and lower transmission risks.
在癥狀出現后48小時內早期使用抗病毒藥物可縮短病程，減少嚴重并發癥并降低傳播風險。
Li said no new strains of respiratory infectious diseases have been identified so far.
李侗曾說，到目前為止還沒有發現新的呼吸道傳染病菌株。
Symptoms like dizziness, headaches, fatigue and muscle aches are common with respiratory infections, he added.
他補充說，頭暈、頭痛、疲勞和肌肉疼痛等癥狀是呼吸道感染的常見癥狀。
The Chinese Center for Disease Control and Prevention reported increased acute respiratory infections nationwide, including a rise in human metapneumovirus infections.
中國疾病預防控制中心發布全國呼吸道傳染病監測情況，急性呼吸道傳染病呈現持續上升趨勢，其中，人偏肺病毒（HMPV）感染逐漸增多。
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.
人乳頭狀瘤病毒是2001年發現的一種相對較新的病毒，由于監測工作的擴大，正在越來越多地得到確認。該病毒引起急性呼吸道感染，并可導致細支氣管炎、哮喘和肺炎，特別是在嬰兒、幼兒和免疫系統較弱的人群中。
"Symptoms of HMPV are similar to the flu, making it difficult to distinguish between the two without specific testing," Li said.
“HMPV的癥狀與流感相似，如果沒有專門的檢測，很難區分兩者，”李侗曾說。
編輯：黎霈融
來源：中國青年報綜合北京日報 CHINADAILY 中國疾控中心
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