Epidemiology: SLEV

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Epidemiology: SLEV

The number of cases is the United States varies year by year with periodic outbreaks. Most cases occur in the southeastern and central US, with some in the western states. Cases are most prevalent in the summer and early fall but may occur year round in the South. Cases are rarely seen outside the US.
People who work or play outdoors are most at risk. Older persons are most at risk for death. The case fatality rate ranges from 5 to 15%. The graph and map show cases of St. Louis encephalitis neuroinvasive disease reported between 2011-2020 by ArboNET/CDC.46
46. CDC. St. Louis encephalitis virus neuroinvasive disease cases reported by year, 2011-2020. Public domain image. December 2021. Accessed October 25, 2022. https://www.cdc.gov/sle/statistics/index.html
47. CDC. St. Louis encephalitis virus neuroinvasive disease cases reported by state of residence, 2011-2020. Public domain image. December 2021. Accessed October 25, 2022. https://www.cdc.gov/sle/statistics/index.html

46. St. Louis encephalitis, 2011-2020
47. St. Louis encephalitis cases by state, 2011-2020