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: past medical history: 1. acute disseminated encephalomyelitis. 2. attention deficit hyperactivity disorder. 3. right arm fracture, status post motor vehicle accident, status post surgery with placement of a metal plate. admission medications: the patient is taking no medications at present. he finished one month of a prednisone taper about two weeks prior to admission. allergies: the patient has no known drug allergies. social history: he is single. he lives with his girlfriend. has occasional use of alcohol. he has a one pack per day smoking history, occasional marijuana use. he is a student in college. family history: noncontributory. there are no neurological diseases or autoimmune diseases. physical examination on admission: vital signs: he was afebrile. his blood pressure was 116/67, pulse 80, breathing 18, 02 saturation 99% on room air. in general, he was a well-nourished young man in no distress. his neck was supple. there were no carotid bruits. his lungs were clear to auscultation. cardiovascular: regular rate and rhythm, normal s1, s2, no murmurs, rubs, or gallops. abdomen: soft, nontender. extremities: he had 2+ pulses. neurologic: he is awake, alert, and cooperative with examination and a normal affect. his speech was fluent but there was some scanning. he was oriented to person, place, month, day, and date. attention: he can say months of the year backwards and forward. language: he recalls two out of three items at three minutes, with prompting. he has no apraxia. no neglect. his is intact. cranial nerves: visual fields were full to confrontation. fundi were normal on the right. difficult to visualize on the left. his saccades are hypometric. his pupils are equal, round, and reactive to light, 4 to 2 mm bilaterally. he has no nystagmus. facial sensation and facial movements are normal bilaterally. hearing is intact to finger rub bilaterally. the tongue was midline. there were no fasciculations. sternocleidomastoid and trapezius were normal bilaterally. motor examination: he had normal bulk and tone throughout, no tremor. full strength except in finger extension and in flexion in the right hand. he has a pronator drift that is slight on the right side. his sensation was intact to light touch and temperature as well as proprioception. vibration was decreased bilaterally in the feet. there was no sensory level to pin in the chest. pin was normal bilaterally with hyperesthesia distally in the feet. there was a subjective feeling of tingling in the hands bilaterally. reflexes were 1 in the upper extremities, 2 at the knee and 2 at the ankle. toes were upgoing bilaterally. coordination was ataxic on the right side greater than the left. gait: he can stand but falls over easily to the side. laboratory/radiologic data: white count 12.9, hematocrit 42.5, platelets 269,000. sodium 144, potassium 3.8, chloride 108, bicarbonate 22, bun 17, creatinine 1.1, glucose 122, calcium 9, albumin 4.5, protein 17.3, total bilirubin 0.9, alt 29, ast 8, amylase 34. chest x-ray: no acute process. hospital course: the patient was admitted to the neurology service. he was given solu-medrol 1 gram iv initially and over two days improved markedly. this was switched to prednisone 60 mg p.o. q.d. a lumbar puncture was performed. there were 197 white cells, 11 red blood cells, polys 4%, lymphocytes 86%, monocytes 10%, protein 78, glucose 80. the patient had a repeat mri of his head and of his spine. the initial c2-c3 lesion in his spine had expanded down to c7 and he had a new lesion in the conus. the right parietal occipital lesion had decreased somewhat size and no longer extended across the corpus callosum and the areas of enhancement are reduced. he improved substantially and was able to ambulate normally. by hospital day number three, he was assessed by physical therapy who felt that he was also stable. was discharged on . a brain biopsy was considered to determine pathologically what diagnosis is, however, this was deferred as the constellation of clinical findings including the lesion location, the rapid progression, and the response to steroids were all consistent with acute disseminated encephalomyelitis. will be on prednisone 60 mg p.o. q.d. for three months time. he will then be slowly tapered over the next three months. he will follow-up in clinic with dr. and dr. as an outpatient. this appointment is to be scheduled for but may be changed. , m.d. dictated by: medquist36 procedure: spinal tap incision of lung diagnoses: unspecified infectious and parasitic diseases 

Answer: The patient is high likely exposed to