Too much is unknown about IBD. There are certain things you can do to reduce the risk as others have said, buy from a reputable breeder and quarantine are the best things you can do.
I have my hog island boas quarantined with my ball pythons and that was a risk I was willing to take. I don't have any personally experience with IBD, but everything I have found says that younger snakes are more likely to show symptoms much sooner than adults (and it's still not clear how it spreads). If you are getting a younger snake from a good breeder I think you will be able to relax after quarantine.![]()