title: SARS coronavirus without reservoir originated from an unnatural evolution, experienced the reverse evolution, and finally disappeared in the world.
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China; Clinical Epidemiological Unit, Fourth Military Medical University, China Clinical Epidemiological Network, International Clinical Epidemiological Network, Xi'an, Shaanxi 710032, China. Email: xudezh69@163.com.
authors.forename: Dezhong
authors.initials: D
authors.lastname: Xu
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
authors.forename: Huimin
authors.initials: H
authors.lastname: Sun
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Su
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China; Clinical Epidemiological Unit, Fourth Military Medical University, China Clinical Epidemiological Network, International Clinical Epidemiological Network, Xi'an, Shaanxi 710032, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
authors.forename: Jingxia
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China; Clinical Epidemiological Unit, Fourth Military Medical University, China Clinical Epidemiological Network, International Clinical Epidemiological Network, Xi'an, Shaanxi 710032, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.affiliation: Department of Epidemiology, Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Xu
mesh_terms: D006801:Humans; D045473:Severe acute respiratory syndrome-related coronavirus / Q000145:classification / Q000235:genetics / Q000472:pathogenicity*; D045169:Severe Acute Respiratory Syndrome / Q000821:virology