West Nile virus (WNV) has become endemic in North America with cases in 2012 exceeding that of any other year. Health care professionals and the public need to be on alert for WNV, medical researchers say.
West Nile virus (WNV) has become endemic in North America with cases in 2012 exceeding that of any other year. Health care professionals and the public need to be on alert for WNV, medical researchers say.