Symptoms

Mild symptoms of West Nile Virus include fever, headache, nausea, vomiting, and rash, while severe symptoms include neck stiffness, stupor, disorientation, tremor, coma, vision loss, and paralysis. These severe symptoms may dissipate in a few weeks or could remain permanently.

The onset of symptoms usually begins three to 14 days after an infected mosquito has bitten its victim.  A large portion of reported cases appear from summer to fall in the United States.

80% of the people who are infected with West Nile will show no symptoms at all, while  20% will show mild to serious symptoms. People who are most likely to show mild to more serious symptoms if bitten by an infected mosquito are infants, the elderly and people with auto-immune deficiencies.

In quite a few of the milder cases, the infected person simply believes he or she has a summer "bug" or flu and recovers by just resting and drinking fluids, without ever realizing he or she has had West Nile Virus.

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