This book summarizes the keynote and plenary speeches and posters of the Xth International Nidovirus Symposium: Toward Control of SARS and Other Nidovirus Diseases" that was held in Colorado Springs, Colorado, June 25-30, 2005. The nine previous meetings of scientists investigating the molecular biology and pathogenesis of coronaviruses, toroviruses, arteriviruses, and okaviruses were generally held every 3 years since the first meeting was convened in Wurzburg, Germany, in October, 1980. The Xth International Symposium was held just 2 years after the IXth International Symposium (Nido2003)...