Among those with severe illness due to West Nile Virus, case-fatality rates range from three percent to 15% and are highest among the elderly. Less than one percent of persons infected with West Nile Virus will develop severe illness.
Among those with severe illness due to West Nile Virus, case-fatality rates range from three percent to 15% and are highest among the elderly. Less than one percent of persons infected with West Nile Virus will develop severe illness.
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