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West Nile virus (WNV) affects humans, birds, horses, and other animals. The virus is carried from infected birds (the host animal) to humans and other mammals through mosquito bites. When a mosquito bites, a small amount of blood is injected into the skin of the bitten person or animal. This infected blood can transmit WNV or other similar diseases.

West Nile virus is more commonly found in the eastern United States. West Nile virus disease activity has spread rapidly since 1999, when it was first reported in the United States. The main period of risk is from July through September, but cases have occurred from May through December. The outbreak of WNV infection in the United States during the summer of 2002 was the largest reported. There were 284 deaths and 4156 human cases of WNV infection reported in 2002. The July 23/30, 2003, issue of JAMA includes articles about . . . [Full Text of this Article]

SYMPTOMS OF WEST NILE VIRUS INFECTION



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