Brazil warns high‑risk groups about flu complications and treatment

Influenza causes regular hospitalisations and deaths in Brazil, with the elderly, young children, pregnant women and people with chronic illnesses most vulnerable. Symptoms appear suddenly and include fever, muscle aches, headache, fatigue and a dry cough, differing from the slower‑onset, milder common cold.

Complications such as pneumonia or severe acute respiratory syndrome can develop, especially in those risk groups. Warning signs include persistent high fever, shortness of breath, chest pain, confusion or a return of fever after initial improvement. Health officials recommend early antiviral therapy – typically oseltamivir – started within 48 hours for severe cases or for patients at higher risk. Annual vaccination remains the primary preventive measure, reducing the chance of severe disease.

Patients are advised to stay hydrated, rest and use supportive care like saline nasal rinses, while antibiotics are reserved for confirmed secondary bacterial infections.