Can you catch bronchiolitis more than once? is there anything that can be done early when symptoms first show to try to stop it?

Yes: I assume since you use the term "bronchiolitis" that you are speaking of your baby. Unfortunately, the answer to your first question is yes, babies can catch a new virus again that will cause bronchiolitis. If one is prone to the wheezing that goes along with viruses, then there is not much you can do once the virus has started to hasten the episode. Best of luck!