Zoos Tracking West Nile Virus
It has killed more than 100 Americans so far -- and the West Nile virus is taking a similar toll at U.S. zoos. Many exotic animals are on the casualty list, and experts fear the mosquito-borne illness will strike a species already in danger of extinction. For Morning Edition, NPR's John Nielsen visits Chicago's Lincoln Park Zoo to find out more.
Copyright 2002 NPR