This is an excerpt from "An Alternate Perspective on the Use of Aerial ULV Spray to Attempt to Control Transmission of West Nile Virus in Sacramento County, 2005," by James Northup, Jack Milton and Paul Schramski:

    WNv is in many ways like another mosquito-borne disease that has been endemic in California for over 50 years. From what is known scientifically, WNv should follow the same pattern that Western Equine Encephalitis (WEE) has followed. This disease is more likely to produce a serious disease than is WNv, but it has reached what is called chronic endemicity, and the levels of transmission are so very small and cases so very few that it tends to be ignored by the public. Nonetheless, public officials have suggested that WNv is spreading, and once it gets firmly established in a region we can expect greatly increased rates of infection and numbers of serious cases of the disease. This view is background to the exaggerations that public officials and the media have engaged in on a regular basis since the introduction of WNv into the state.

    Until public officials gain a better understanding of WNv, and until a more through assessment of the data has proven the safety and efficacy of aerial pesticide spraying, a
moratorium should be placed on further spraying. In the interim, other safe and effective methods of mosquito control should be implemented and increased.