About this Dataset

West Nile Virus Cases, 2006-present

This dataset contains positive cases of West Nile virus found in humans by county of residence, 2006-present. Humans usually become infected with West Nile virus by being bitten by an infected mosquito. Viruses carried in the mosquito’s saliva enter the blood stream and local tissues where they infect immune cells. Most of the people who do become sick during a WNV infection develop what is referred to as “West Nile fever.” A small percentage of people will develop a much more serious illness called West Nile neuroinvasive disease (WNND). Positive cases in this dataset include both West Nile fever and West Nile neuroinvasive disease.
Organization: State of California
Last updated: 2025-10-23T12:59:32.559538
Tags: california-department-of-public-health, human-cases, mosquito, west-nile-virus, wnv

Tables

Data Dictionary - West Nile Virus 2006-present

@usgov.ca_gov_west_nile_virus_cases_2006_present_0d4e2.data_dictionary_west_nile_virus_2006_present

3.94 kB
4 rows
3 columns

CREATE TABLE data_dictionary_west_nile_virus_2006_present (
  "column_variable_name" VARCHAR  -- COLUMN / VARIABLE NAME,
  "format" VARCHAR,
  "definition" VARCHAR
);

Table 1

@usgov.ca_gov_west_nile_virus_cases_2006_present_0d4e2.table_1

8.98 kB
2,471 rows
4 columns

CREATE TABLE table_1 (
  "year" BIGINT,
  "week" BIGINT,
  "county" VARCHAR,
  "reported_positive_cases" BIGINT
);