Acute Communicable
Disease Control

 
Contact Information
County of Los Angeles
Department of Public Health
Acute Communicable Disease Control
313 N. Figueroa Street, #212
Los Angeles, CA 90012
Phone: (213) 240-7941
Fax: (213) 482-4856
Email:acdc2@ph.lacounty.gov

Call 211 For Information 24/7

Have questions about things like where to go for vaccinations or other health care services?

Call 2-1-1.

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(Back to West Nile Virus Main Page)


WNV in Los Angeles County

WNV first emerged in Los Angeles County in 2004, and since has caused significant numbers of illnesses, including hospitalizations and deaths. Los Angeles County has experienced increased levels of WNV activity for the past 6 years. Each year, between 150 and 300 people in Los Angeles County are identified with WNV infection. While everyone is at risk for WNV, people over 50 and those with health problems are at greater risk of serious illness, this can include meningitis (brain infection), encephalitis (swelling of the brain) and limb paralysis. 

The Los Angeles County Department of Public health urges all residents to limit the spread WNV by stopping mosquitoes from infesting your home and yard, and to protect yourself and your family from mosquito bites by using repellant when outdoors.

Having problems with mosquitoes? Contact information is available HERE.

News and Updates:
  • LAC DPH Health Alert: First Locally Acquired Case of Dengue in California Detected in Pasadena(10-23-23)
  • Arbo Report: West Nile Virus and Other Arboviral Diseases Epidemiology Report #14
  • Press Release: First West Nile Virus Death Reported in LA County - First death of 2023 reinforces need for all residents to take precautions against mosquitoes (9-7-23)
  • FINAL REPORT: West Nile Virus and Other Arboviral Diseases Epidemiology Final Report 2022
 
SIGN UP: To receive the free weekly emailed West Nile Virus and Other Arboviral Diseases Report (published during West Nile virus season) email "Subscribe WNV" to ACDC2@ph.lacounty.gov

Confirmed West Nile Infections and Fatalities in Los Angeles County by Year*
Year Infections Hospitalizations Deaths
2023 69 60 3
2022 64 50 0
2021 17 12 1
2020 93 24 7
2019 29 24 3
2018 47 37 3
2017 268 224 27
2016 153 131 6
2015 300 262 24
2014 218 180 7
2013 165 122 9
2012 174 133 6
2011 63 49 4
2010 4 3 0
2009 25 15 1
2008 170 125 6
2007 43 31 5
2006 16 5 0
2005 43 30 0
2004 309 179 13
*Excludes Long Beach and Pasadena. Includes asymptomatic blood and organ donors
**Update as of 11/09/2023

Surveillance Summaries


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Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.
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