There is a bug!

[Videojuegos Fermín]

...And we will fix it in the next versions.

However,
If the game allowed you to access the hospital but later you get stuck because you can not go back in, just look at the brochure that the ambulance guys gave you.

That should work.

Thank you for your interest.

[76561198959663470]

I looked the brochure and can't access to the hospital again.

[Videojuegos Fermín]

So sorry. Really strange. The other way to "destroy the bug" is looking at the advertisements into the hospital, just to the right of the classroom door. Restart the game, look at the brochure and look at the advertisements after that. It´s boring, but it should work for sure.