'This virus, named for an African geographical feature, came to the U.S. in 1999'
the West Nile Virus
TOUGH SCIENCE: This virus, named for an African geographical feature, came to the U.S. in 1999
This virus, named for an African geographical feature, came to the U.S. in 1999
This virus, named for an African geographical feature, came to the U.S. in 1999
TOUGH SCIENCE
the West Nile Virus
TOUGH SCIENCE