West Nile virus

West Nile Virus Incidence Increases in U.S.

More than 3,000 cases of domestic arboviral disease were reported in 2021, including the largest local outbreak of ...

SEPTEMBER 25, 2023

Maricopa County, Arizona, Reports Largest West Nile Outbreak in U.S.

During 2021, Maricopa County, Arizona, experienced an outbreak of West Nile virus (WNV), which is the largest ever ...

JUNE 5, 2023

West Nile Rates Fall, Other Arboviral Diseases Rise

While rates of West Nile virus fell, other arboviral diseases rose to historic highs.

AUGUST 25, 2021

Incidents of Arboviral Diseases Rise

Rates of West Nile virus alone were nearly 25% higher in 2018 than the median incidence during 2008-2017.

AUGUST 21, 2019

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