<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, I am a 54 Year old woman . I used to suffer from asthma and bronchitis as a child. I have just found out I have bronchitis., which I havent had for 20 years or more. I have been spending lots of time with my grand daughters and Im worried that i might be contagious. What are your thoughts. Thank you Cathy  <response>: 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 regularlyAvoid touching your eyes, nose and mouthed an annual flu vaccination do hope that you have found something helpful, and I will be glad to answer any further query. Take care 