Fever, Myalgia, and Headache Progressing to Confusion: A Case of Neuroinvasive West Nile Virus in the Older Adult

West Nile Virus (WNV) infection is the most common mosquito-borne illness in the United States. Most cases are asymptomatic or with mild symptoms. Older adults are more likely to have central nervous system (CNS) involvement, and a higher risk for mortality.