Fig 1.
Human West Nile virus infections reported to California Department of Public Health, by clinical presentation, by year, California, 2003–2018.
Table 1.
Demographic characteristics of human West Nile virus (WNV) disease cases (n = 6,909) and asymptomatic infections (n = 730) reported to the California Department of Public Health, 2003–2018.
Fig 2.
West Nile neuroinvasive disease cumulative incidence per 100,000 persons, by county, California, 2003–2018.
Table 2.
Clinical characteristics of human West Nile neuroinvasive disease (n = 4,073) and non-neuroinvasive disease cases (n = 2,784) reported to the California Department of Public Health, 2003–2018.
Fig 3.
Reported human West Nile virus infections in California, 2003–2018, A) by month of onset date, and by onset week, stratified by year of occurrence in B) Southern California and C) California’s Central Valley*.
Fig 4.
West Nile virus (WNV) enzootic activity in California, 2003–2018 in A) mosquito pools tested with WNV minimum infection rates (MIR) per 1,000 tested B) sentinel chickens tested with number of seroconversions, and C) dead wild birds tested with the number that were WNV positive.
Fig 5.
West Nile virus activity by year and region in California, 2004–2018, A) West Nile neuroinvasive disease incidence per 100,000 persons (annual), B) mosquito minimum infection rate per 1,000 mosquitoes tested (July-October), C) proportion of sentinel chicken flocks that seroconverted (July-October) and D) proportion of tested dead wild birds positive for WNV (July-October).