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U.S. Department of Health and Human Services

Mosquitoes and West Nile Virus

Natural disasters, particularly hurricanes and flooding, can affect vector-breeding sites and vector borne disease transmission. While initial flooding may wash away existing mosquito-breeding sites, standing water caused by heavy rainfall or overflow of rivers can create new breeding sites. This situation can result (with typically some weeks’ delay) in an increase of the vector population and potential for disease transmission, depending on the local mosquito vector species and its preferred habitat.

Risk to exposure to vector borne disease is high especially Since 1999, more than 30,000 people in the United States have been reported as getting sick with West Nile virus. Infected mosquitoes spread West Nile virus (WNV) that can cause serious, life altering disease.

  • This page last reviewed: January 18, 2019