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: allergies: patient recorded as having no known allergies to drugs attending: chief complaint: fall with loss of consciousness major surgical or invasive procedure: arterial line placement history of present illness: 85 year-old man with baseline dementia fell backward at nursing home striking head and lost consciouness. he was transported to the where a ct scan revealed a left occipital fx, sdh, sah, and frontal contusions. the patient is dnr/dni and this was confirmed with his family at the time of presentation. past medical history: dementia- baseline verbal but confused, vit b12 defic, htn, mi, cva social history: dnr/dni demented, lives at nursing home poor verbal skills at baseline family history: non-contributory physical exam: withdraws to pain, verbalizes inappropriately. pupils equal 3-2 mm bilaterally lungs clear bilaterally heart is regular abdomen is soft there are no obvious deformities of the extremities pertinent results: 07:30am wbc-18.1* rbc-4.40* hgb-13.5* hct-38.6* mcv-88 mch-30.7 mchc-35.0 rdw-14.4 07:30am pt-12.0 ptt-21.5* inr(pt)-1.0 07:30am urine blood-tr nitrite-neg protein-neg glucose-neg ketone-15 bilirubin-neg urobilngn-neg ph-6.5 leuk-neg 07:30am phenytoin-21.2* 07:30am amylase-65 07:30am urea n-27* creat-1.0 08:06am glucose-176* lactate-1.5 na+-138 k+-3.3* cl--98* 02:04pm ck-mb-notdone ctropnt-0.01 brief hospital course: mr. was admitted to the trauma icu for medical management of his intracranial bleeding. he was dnr/dni and this was confirmed with his family at the time of admission. his advanced directives precluded operative intervention or endotracheal intubation, thus management was directed at control of blood pressure, and tight glycemic control. mr. remained stable over the first several hours in the icu and was transitioned to beta-blockade for blood pressure control. his mental status was demonstrating moderate improvement when he abruptly experience ventricular fibrillation. as he was dnr/dni, resuscitative measures including acls protocol were not initiated. he expired shortly after this event. medications on admission: hctz 25 mg po qd, fluoxetine 40 mg po qd, atenolol 50 mg po qd, asa 325 mg po qd, nitro patch 0.2, vit b12 250 mg po qd discharge medications: none discharge disposition: expired discharge diagnosis: expired discharge condition: expired discharge instructions: none followup instructions: none procedure: enteral infusion of concentrated nutritional substances arterial catheterization diagnoses: unspecified essential hypertension unspecified fall other persistent mental disorders due to conditions classified elsewhere ventricular fibrillation closed fracture of base of skull with subarachnoid, subdural, and extradural hemorrhage, with loss of consciousness of unspecified duration cerebellar or brain stem contusion without mention of open intracranial wound, with loss of consciousness of unspecified duration 

Answer: The patient is high likely exposed to