WordNet sense 1 (put out of action (by illness)):

laid low

WordNet sense 2 (grievously affected especially by disease):

afflicted

WordNet sense 3 (affected by an impairment of normal physical or mental function):

ill, sick

WordNet sense 4 ((used in combination) affected by something overwhelming):

smitten, struck

WordNet sense 5 (acted upon; influenced):

affected