What are the chances?

So I found out yesterday that an agency worker that occasionally comes to work at the place where I work also has Cystic Fibrosis! It's a small children's home in the middle of nowhere and I found out she actually lives in the same Town as me and I travel 45mins in to work so...what are the chances of that? We only found out through others as I have told absolutley all the full time staff at work and it's only that she told one of them and they were like 'ooo Marisa has that too!'. So we've obviously made sure management know now never to put us on shift together and I've just added her on Facebook so hopefully we can chat as I find it so exciting to meet someone else with the same and same interest of work too! Then we'll just be able to share a wave when we're next on the same shift together there as cross infection is too high risk with Cystic Fibrosis - It's general knowledge to us but I found when telling people why we can't meet up they found it really hard to understand!