I love your guys take on real diseases. I'd also love to see that we can admitting patient for a number of days to further diagnose, running scans, wait for laboratory results, time to cure... A hospital that can't admitting patients is just a clinic to be honest. On the management note, I would love to see the infection control aspect implemented in the game. That would make the logistic(providing sterile equipment and clothes) and hospital layout even more interesting to manage, especially when expanding the hospital.
Yes, the feature is currently in development - there will be different types ranging from observation to ICU, we'll be showing a few screenshots soon.
Regarding dealing with infectious diseases, this one will probably slip to a post-release update, but we have some designs for how the system should work, including a possible quarantine. Also, we plan a lot of different events, which are bound to include some epidemics. :)