Hello, Thanks for your query. Yes. Most cases of acute bronchitis are caused by viral infections. Influenza viruses are a common cause, but many other viruses also have been identified in people with bronchitis. These viruses spread from person to person through direct and indirect contact. To reduce the risk of catching bronchitis: Avoid close contact with sick people Wash your hands often or use hand sanitizers regularly Avoid touching your eyes, nose and mouth Get an annual flu vaccination I do hope that you have found something helpful and I will be glad to answer any further query. Take care