Debilitated is a possibility:
The siege of pneumonia debilitated her completely.
For your sentence, bedridden, seems to apply:
A few days after the event, I became bedridden and couldn't get out of
bed for a few days.
There's also enfeebled:
Further, as we saw that most of those who went inland to explore fell
sick on their return, or even had to turn back on the way, this was a
reason to fear that the same might befall those healthy men who might
make such an expedition now. And two perils might threaten them there
in consquence. First, if they were to fall sick out there in the
course of the work, where there is no house nor refuge of any sort
from the chief they call Caonabo (who by all accounts is a very bad
man and - even more - a very bold one), he seeing us there enfeebled
and ill, would be able to undertake that which he would not dare if
we were in normal health.
~ Christopher Columbus, Columbus on Himself