skip to content, health centers and clinics, search, accessibility statement
  • Home
  • Topics
  • Services
  • Health Coverage
  • Connect with CCHS: 

Breaking News: Health Advisory for Contra Costa County

Last updated: November 10, 2018, 12:38 pm

The Bay Area Air Quality Management District reports that parts of our county have unhealthy air due to smoke. Please follow the following tips to protect yourself and your loved ones. Everyone, especially children, should reduce outdoor activity. Active children and adults, and people with respiratory disease such as asthma, should avoid prolonged outdoor activity. Masks are not a substitute for staying indoors. Masks such as the N-95 are not effective for untrained users and may be dangerous for people with lung or heart conditions. N-95 masks may be helpful for people who must work outdoors if properly fitted. Employees should work with their employers for direction on when/how to use N-95 masks. Seek medical attention if you experience symptoms like repeated coughing, difficulty breathing, wheezing, chest tightness, palpitations, nausea, fatigue or lightheadedness. Visit for smoke tips and for air quality in your area

West Nile Virus

West Nile virus is an infection of birds that is transmitted by mosquitoes. Occasionally, humans and animals are infected when bitten by an infected mosquito. West Nile virus tends to be seasonal, beginning in the early summer and continuing through fall. In humans, most infections, 70-80% infections result in no symptoms. About 20-30% of persons who are infected will have symptoms that may include fever, headache, rash, nausea, vomiting and body ache. Less than 1% of persons who are infected will have severe illness and while rare, it can be fatal for the elderly and people with compromised immune systems.

What You Can Do:

  • Protect your home & garden from mosquito breeding and use insect repellents when outside.
  • Report dead birds and squirrels to monitor West Nile Virus activity. To report a dead bird or squirrel in California, complete a web-based form or call 1-877-968-2473.
  • Report neglected (green) swimming pools to Contra Costa Mosquito & Vector Control, complete a web-based report or call 925-771-6196. Free mosquitofish can be requested. Neglected pools, ponds, and troughs produce mosquitoes putting you and your family at high risk for West Nile virus.

About WNV
Videos & Podcast
Links & Articles