West Nile Virus

Because West Nile Virus (WNV) can cause debilitating illness in 20% of those infected, and no treatment is currently available, everyone should take precautions to prevent being bitten by mosquitoes.

Follow the Four D’s when mosquitoes are most active (June through September) to help reduce the risk of being infected with WNV.

  1. DEET - use DEET containing repellent
  2. Dress - long sleeves and long pants
  3. Dawn/Dusk - the most active times for mosquitos
  4. Drain - drain standing water 

For more information on current WNV disease and precautions visit Boulder County Public Health, Personal West Nile Virus Prevention