Respiratory Tract Infection, Influenza
Автор: Aled Roberts
Загружено: 2026-02-03
Просмотров: 1
Описание: In this video, influenza is presented as an example of a viral upper respiratory tract infection, outlining how the influenza virus is transmitted via respiratory droplets and establishes infection with a relatively low infectious dose. The video explains the structure of the influenza virus, highlighting the roles of haemagglutinin in cell entry and neuraminidase in viral release, and describes how viral replication damages respiratory epithelial cells and triggers a strong inflammatory response. Key concepts of antigenic drift and antigenic shift are introduced to explain seasonal variation and the emergence of pandemic strains. The resulting host response, including cytokine release, impaired mucociliary clearance, and typical “flu-like” symptoms, is discussed alongside potential complications. Finally, the video covers management strategies, ranging from self-care and antiviral therapy to vaccination, emphasising the importance of annual immunisation, particularly for vulnerable groups. 
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