Items corresponding to entire populations or subpopulations. Might be geographically or temporally temporally limited.

population

This CDC page presents current-year West Nile Virus surveillance data collected through ArboNET. The data includes human case counts reported at state, but also county level including neuroinvasive cases. The page presents maps and tables showing case counts and geographic distribution of West Nile Virus activity across the United States. The data are downloadable in a CSV format.

non-collection specific

(Simple) Released

Comma-separated values: a delimited text file format for tabular data.

County

State

Country

United States

English

U.S. Centers for Disease Control and Prevention (CDC)

West Nile Virus Current Year Data

A mosquito-borne viral illness caused by the west nile virus, a flavivirus and endemic to regions of Africa, Asia, and Europe. Common clinical features include headache; fever; maculopapular rash; gastrointestinal symptoms; and lymphadenopathy. meningitis; encephalitis; and myelitis may also occur. The disease may occasionally be fatal or leave survivors with residual neurologic deficits. (From Joynt, Clinical Neurology, 1996, Ch26, p13; Lancet 1998 Sep 5;352(9130):767-71)

West Nile fever

West Nile Fever

Infection by an etiologic agent that can be passed between animals and humans.

Zoonotic Infection

Zoonotic infection

A disease is a disposition (i) to undergo pathological processes that (ii) exists in an organism because of one or more disorders in that organism.

disease

Disease

A disease whose physical basis is an infectious disorder

infectious disease

Infectious Disease

A species of FLAVIVIRUS, one of the Japanese encephalitis virus group (ENCEPHALITIS VIRUSES, JAPANESE). It can infect birds and mammals. In humans, it is seen most frequently in Africa, Asia, and Europe presenting as a silent infection or undifferentiated fever (WEST NILE FEVER). The virus appeared in North America for the first time in 1999. It is transmitted mainly by CULEX spp mosquitoes which feed primarily on birds, but it can also be carried by the Asian Tiger mosquito, AEDES albopictus, which feeds mainly on mammals.

West Nile virus

A count of individuals in a population who meet the criteria of some case definition during some time interval.

count of disease cases

Case Count

viral Infectious disease

Viruses Infection

A count of disease cases that is the total number of individuals who come to meet the criteria of some case definition during a reference temporal interval.

cumulative case count

Cumulative Case Count

 A count of simulated or physical individuals in a population.

Population count

Population Count

An infectious disease where a pathogen is carried and transmitted by another organism that acts as disease vector.

vector-borne disease

Vector-borne Infection

Minute infectious agents whose genomes are composed of DNA or RNA, but not both. They are characterized by a lack of independent metabolism and the inability to replicate outside living host cells.

Viruses

An organism of a particular biological taxon that is the bearer of an infectious dispositions towards an organism of a different particular biological taxon.

pathogen

Pathogen

A data item that is an aggregate of other data items of the same type that have something in common. Averages and distributions can be determined for data sets.

data set

Topic

Geographic Resolution

Digital Object Type

Apache 2.0

Schema.org vocabulary for structured data on the web

Schema.org

A structured data markup specification for describing datasets in the life sciences, extending schema.org Dataset

Bioschemas Dataset Profile

Dublin Core Metadata Initiative Terms - refined elements for precise resource description

DCMI Metadata Terms

W3C Data Catalog Vocabulary for describing data catalogs

Data Catalog Vocabulary

DataCite metadata schema for research data citation

DataCite Metadata Schema

W3C Provenance Ontology for describing provenance information

PROV Ontology

Provenance, Authoring and Versioning ontology for metadata about web resources

PAV Ontology

Custom MIDAS vocabulary for epidemiological data and modeling

MIDAS Metadata Vocabulary

OBO Foundry ontologies for life sciences and biomedical research

Open Biological and Biomedical Ontology

GeoNames Ontology

Health Level 7 Fast Healthcare Interoperability Resources

HL7 FHIR

Systematized Nomenclature of Medicine Clinical Terms

SNOMED Clinical Terms

LOINC database for laboratory and clinical observations

Logical Observation Identifiers Names and Codes

JSON Schema (Draft 2020-12) defining the structure of MIDAS Catalog JSON-LD metadata records

MIDAS Catalog JSON-LD Schema

Searchable collection of curated datasets and software resources for infectious disease modeling, filterable by disease, topic, location, and time period.

Identifier	URL: https://www.cdc.gov/west-nile-virus/data-maps/current-year-data.html
Type	Data Set
Topics/About	Disease Infectious Disease Vector-borne Infection West Nile Fever Viruses Infection West Nile Fever Zoonotic infection West Nile fever Pathogen Viruses West Nile virus Population Count Case Count Cumulative Case Count
Language	English
Rights	https://www.cdc.gov/other/agencymaterials.html
Accessible For Free	TRUE
Biological Scale	population
Geographical Scope	United States
Geographical Resolution	County, State, Country
File Format	CSV
Version	unspecified
HTTP Status Code	200
HTTP Checked On	2026/09/27