chinchin

i recently was hired as a dialysis nurse. upon hiring, labs were taken. i was told that they would check for hep b. report came back that i am hep c positive, which i knew but did not disclose this information. nor was i asked to. now, my don tells me that corporate policy says that hep c positive nurses cannot work in patient care. she requested a note from my gastro doc stating that i could work. when i called him and asked for a note, he said it was illegal, (he thinks) that it is ridiculous what they are doing and that i should seek other help. he said he would write a note, but then he says that he won't. he has never heard of such a thing, he says. also, he knows plenty of docs and nurses with hep c. he thinks i should fight it. (but preferably without his help) my don showed me the policy that her administrator gave her. it clearly states that we (the hep c employees) must change position or be relived of duty. there is no other position at this company for me, as she stated. i agree. so, the question is, is it illegal? if the employee handbook says they can't discriminate for the usual (health, race,etc) why am i being discriminated against? or am i? i have turned down other jobs for this one. should i pursue or resign? thanks in advance for your help. feeling slammed, chinchin