How long does it take to spread bronchitis?

Bronchitis, particularly acute bronchitis, is often caused by viral infections, and it can be contagious for a few days to a week, depending on the underlying cause. The virus can spread through respiratory droplets when an infected person coughs or sneezes. Close contact with infected individuals or touching surfaces contaminated with the virus can also facilitate transmission. Chronic bronchitis, on the other hand, is not contagious as it is usually caused by long-term irritants rather than infections.