Emergencies preparedness, response

2002 - West Nile virus in the United States - Update 4

24 September 2002

Disease Outbreak Reported

As of 23 September 2002, the WHO Collaborating Centre for Arthropod Borne Viruses - Western Hemisphere, at the Centers for Disease Control and Prevention (CDC) has reported 1 963 human cases of the West Nile virus, with 94 deaths occurring in 32 states and the District of Columbia. During 2002, West Nile virus activity (evidence of infections in birds, humans, mosquitoes, and other animals - primarily horses) has been documented in 42 states and the District of Columbia (see previous report).