The journal Nature offers this free Web focus on Severe Acute Respiratory Syndrome (SARS), in which "Nature's reporters pose key questions about the outbreak, and assess our preparedness to deal with future viral threats." Reader will find dozens of articles, including editorials, Science Updates, and Brief Communications from the journal. The articles trace the chronology of the SARS epidemic,...

Given the increased concern over contagious diseases and viruses spread by various host animals and insects (such as the West Nile virus), these maps provided by the USGS are both helpful in their pragmatic applications, and for those studying the spatial distribution of the West Nile virus. The Web site begins with a brief background essay on the history of the virus, how the virus is...