The short answer: bronchitis itself is an inflammation of the airways — but the viruses that usually trigger acute bronchitis can spread from person to person.
Acute bronchitis typically follows a viral cold or flu and settles within one to three weeks, though the cough can linger longer. Chronic bronchitis — a long-term condition often linked to smoking or pollution exposure — is not contagious at all.
When acute bronchitis follows a virus, that virus can pass through coughs, sneezes and shared surfaces during the first several days of illness. Once the viral phase passes, the lingering cough itself is generally not a sign of ongoing contagiousness.
Frequent handwashing, covering coughs, avoiding close contact while symptoms are fresh, and not sharing utensils or towels are sensible everyday measures — especially around infants, older adults and anyone with a weakened immune system.
A cough lasting beyond three weeks, high fever, breathlessness, chest pain, or coughing up blood all warrant prompt attention from a qualified medical practitioner.
This article is educational and general. Your situation has its own context — for symptoms that are severe, sudden, persistent or worrying, consult a qualified medical practitioner.
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