The Collaborative International Dictionary of English v.0.48:
nonimmune \nonimmune\ adj. (Med.) Not having immunity; susceptible; likely to be affected with, if exposed. Syn: liable to(predicate), nonresistant, unresistant, susceptible to(predicate). [WordNet 1.5]WordNet (r) 3.0 (2006):
nonimmune adj 1: (often followed by `to') likely to be affected with; "liable to diabetes" [syn: liable(p), nonimmune, nonresistant, unresistant]