When I was hospitalized as a teenager, I made a lot temporary friends from my stay that ended up on social media with me. We weren't ever that close, but for a while there was some contact before it fizzled out eventually.
My recent hospitalization was a lot different. I hung out with one other student, he was the only other student and only one my age, and a woman that had suffered through a lot of the same things I had. Everyone else had been there a lot longer, were very messed up. I was glad to leave and forget it all by the end of it.