發(fā)布日期：2006-04-15 來(lái)源：- 作者：1020 x 495 像素
核心提示：a) A map of the New York City area with
dots representing the locations where people lived who were con?rmed to be infected with
West Nile virus during the fall of 1999. b) Global distribution of different strains of Nile viruses.
Note that prior
