Bronchitis is an inflammation of the bronchial tubes that carry air to and from the lungs. It can be caused by a virus, bacteria, or irritants like smoke and pollution. Bronchitis can be contagious and can spread through contact with an infected person’s respiratory secretions. This can happen when an infected person coughs or sneezes, releasing droplets that contain the virus or bacteria that cause bronchitis. These droplets can be inhaled by others or can contaminate surfaces that others may touch, leading to transmission of the infection. To reduce the risk of spreading bronchitis, it’s important to cover your mouth and nose when coughing or sneezing, wash your hands regularly, and avoid close contact with others who have the infection.