SOLVED. YA? fiction book about these teens in a hospital and are used for other kids. takes place in hospital. Read around 2017-19. [s]

[Kurtis]

These teens were in a hospital and I THINK they were terminally ill. They were given this medicine that was red? and someone convinced the main character to spit it out into the shower?
Apparently they would end up killing the kids and turning them into kids that people had lost.
There was also a garden or outside area that they would try getting through. There was one point where people were rioting outside to release the kids.
I'm 90% sure it all takes place within the hospital.
It is NOT Unwind.

[Becca]

The Haven by Carol Lynch Williams?

[Kurtis]

Becca wrote: "The Haven by Carol Lynch Williams?"

Oh my goodness, yes! Thank you so much.