How can I prevent catching bronchitis?

WASH YOUR HANDS! With any sickness washing your hands is a huge defense against germs. EmergenC is a good imune booster to help kill off any germs and you can find it at wal-mart for sure. I and my grandfather have asthma so I know what that's like. I think if your really worried get one of those masks to wear over your face to prevent it. One of those that some people wear when their like mowing or using a chain saw. It keeps all the air born germs away. Good LUCK! and if you do get it.. LOTS of water.