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Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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West Nile Virus
- Overview, Causes, & Risk Factors
- Symptoms & Signs
- Diagnosis & Tests
- Prevention & Expectations
- Treatment & Monitoring
- Attribution
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Symptoms & Signs
What are the signs and symptoms of the infection?
Most people who become infected with West Nile virus have no symptoms. For people who do develop symptoms, most will be mild and can include:
These symptoms generally last less than a week. Many people do have ongoing fatigue for a longer period.
Less than 1% of infected people may develop a more serious illness. Among this very small number, there is a 3 to 15% rate of death. Most of those who are at risk of dying are adults over the age of 65.
Symptoms of West Nile encephalitis include:
A small number of cases of West Nile encephalitis have been fatal. This has been most common in the elderly.