After its initial appearance in New York in 1999, West Nile virus spread across the United States in just a few years and is now well established throughout North and South America. Researchers have found that in most places only a few key species of bird "hosts" and mosquito "vectors" are important in transmission of the virus.

Source: West Nile virus transmission linked to land use patterns and 'super-spreaders'


David Cottle

UBB Owner & Administrator