Given the increased concern over contagious diseases and viruses spread by various host animals and insects (such as the West Nile virus), these maps provided by the USGS are both helpful in their pragmatic applications, and for those studying the spatial distribution of the West Nile virus. The Web site begins with a brief background essay on the history of the virus, how the virus is transmitted, and the symptoms that may be evident by those who have become infected. The maps track which states have tested various carriers (such as birds, humans, and mosquitoes) for West Nile virus, and where these tests have turned up positive results. The Web site is updated frequently, and where available, also contains links to state and county public health agencies. [KMG]
Comments