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West Nile Virus: Clinical Description (from CDC)
West Nile Fever
Most persons who become infected with West Nile virus (WNV) develop no clinical illness or symptoms. In previous outbreaks in the Northern Hemisphere, an estimated 80% of people who became infected with WNV never developed symptoms attributable to the infection.
Of the approximately 20% of infected people who do develop symptoms, most develop what has been termed West Nile fever. The incubation period for WNV infection is thought to range from about 2 to 14 days, although longer incubation periods have been documented in immunosuppressed persons.
Clinical Features of West Nile Fever
Fever
Headache
Malaise
Arthralgia or myalgia
Nausea and vomiting (occasionally)
Skin rash on the trunk of the body (occasionally)
Swollen lymph glands (occasionally)
Eye pain (occasionally)
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