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In most cases, the fever tends to last for 2–3 days and the malaise or tiredness may persist for up to 2 weeks.
It is worth noting that some of the symptoms and their intensity can vary greatly between different age groups. In children, for instance, flu often causes inflammation of the middle ear or gastrointestinal symptoms such as nausea, vomiting or diarrhoea, yet these are rarely experienced by adults. Whereas elderly patients tend to suffer from breathing difficulties and excessive phlegm production.
Healthy people usually recover within one or two weeks after the onset of symptoms, although some may develop complications such as bronchitis, otitis, sinusitis or pneumonia. However, influenza may worsen the underlying condition of patients with chronic heart and/or lung diseases, for example, those with asthma, diabetes, COPD or heart problems. In very rare cases, it can cause neurological complications such as Guillain–Barré syndrome.
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Substantiated information by:
Anna LlupiàSpecialist in Preventive Medicine and Epidemiology
Antoni TrillaSenior Consultant Head of the Department of Preventive Medicine and Epidemiology
Catia Cillóniz Campos
Published: 10 March 2020
Updated: 10 March 2020
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