Consider the following medical report that includes the patient's historical health records. Use it to predict the disease that the patient is high likely exposed to. 

 Medical Report: history of present illness: the patient is a 44-year-old female who is postoperative day five status post coiling for a right vertebral aneurysm. the patient awoke on with the sudden onset of a headache. over the next two days she took flexeril, tylenol, and naprosyn without relief. she then developed photophobia, nausea, and vomiting. she presented to the emergency department. at that time, she underwent a lumbar puncture and magnetic resonance imaging/magnetic resonance angiography which were both negative. she then underwent an angiogram which showed a dissecting right vertebral aneurysm. past medical/surgical history: (past medical history includes) 1. multiple sclerosis; treated with avonex. past flares have included numbness from the waist down and blurred vision. per the patient, no spinal cord lesions. 2. avascular necrosis of the bilateral shoulders; status post shoulder replacement. 3. tubal ligation. 4. two successful pregnancies and one miscarriage. 5. gallstones. 6. a recent history of pancreatitis. brief summary of hospital course: on , she underwent coiling of her aneurysm. her perioperative course was uneventful except for a persistent headache. she has now been out of bed ambulating and tolerating oral intake. she was seen by physical therapy and cleared for a home safety evaluation. she is now ready for discharge. discharge instructions/followup: 1. the patient was instructed to follow up in one to two weeks with dr. . 2. the patient was instructed to follow up with the pain clinic evaluation for her headaches. medications on discharge: (her discharge medications included) 1. percocet 5/325-mg tablets. 2. aspirin 325 mg by mouth once per day. 3. flexeril 10 mg by mouth at hour of sleep. 4. diazepam 5 mg by mouth q.6h. as needed (for pain). 5. metoprolol 50 mg by mouth twice per day. 6. wellbutrin sustained release 75-mg tablets two tablets by mouth every day. 7. interferon beta-1a every sunday. , m.d. dictated by: medquist36 procedure: spinal tap incision of lung spinal tap incision of lung arteriography of cerebral arteries endovascular (total) embolization or occlusion of head and neck vessels spinal blood patch diagnoses: cerebral aneurysm, nonruptured multiple sclerosis 

Answer: The patient is high likely exposed to