Disease with high fever and hemorrhage of internal organs and into the skin. It is caused by several kinds of virus (of which Ebola, dengue, and yellow fever are the best known), some carried by ticks, mosquitoes, or animals. Initial symptoms may include head, muscle, joint, and abdominal pain; nausea and vomiting; sweating and thirst; and coldlike symptoms. It comes on suddenly and can cause severe kidney damage. Patients who are severely ill may also experience shock and neurologic effects.
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