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West Nile Virus (WNV)

West Nile Virus (WNV) is an arbovirus most commonly spread to people y infected mosquitoes. It was first detected in eastern United States in 1999 and since then cases have been reported in all states of the continental U.S. The virus was first detected in Long Beach among mosquitoes in 2003, and the first human case was reported a year later in 2004.

Most people who become infected with WNV do not develop any symptoms, however, approximately 1 in 5 people who are infected will develop a fever with symptoms such as headache, body aches, joint pains, vomiting, diarrhea, or rash. West Nile Virus has also been found to cause neurologic illness such as encephalitis or meningitis in approximately 1% of people who are infected. Anyone living in an area where WNV is present can become infected, however, people over the age of 50 have a higher likelihood of becoming sick and are more likely to develop serious symptoms.


West Nile Virus Cases by Year in Long Beach (2012-2022)

West Nile Virus Cases1 by Year in Long Beach, CA​

Year

Number of cases

2012​

2

2013​

7​

2014​

56​

2015​

14​

2016​

4​

2017​

15​

2018​

0​

2019​

2​

2020​

5​

2021​

2

20222

4

1Includes confirmed and probable cases​
2Year to date as of 11/11/22​

West Nile Virus Cases in Long Beach by Zip Code (2014-2021)

West Nile Virus Cases by Zipcode

Last Updated: October 26, 2022


Protect Yourself and Others

  • Prevent mosquito bites by applying insect repellent with EPA-registered active ingredients DEET, picaridin, IR3535, or lemon eucalyptus before you go outside
  • Wear long-sleeved shirts and long pants if spending time outside during DAWN and DUSK. WNV-carrying mosquitoes are most active during those times
  • Install or repair door and window screens
  • DUMP and DRAIN standing water around your home
  • Report mosquitoes online or by phone at (562) 570-4132
  • Report dead birds online or call 877-WNV-BIRD (968-2473)

Reports

2012-2017 WNV Report


Where can I learn more about WNV?

California Department of Public Health
Centers for Disease Control and Prevention