How do you catch bronchitis? i have it now but i'm trying to figure out how i got it and how to prevent it from spreading. thank you.

Bronchitis: Is a loose term we use for the presumed inflammation of the larger airways, the bronchi in the lungs from any cause which could be infectious, etc. But if infectious mostly viral unless there are symptoms of fever or other upper infection to start with. Handwashing and not coughing on others is the way to prevent spread. If needed, in minority of cases, use antibiotics to prevent shedding.