title: [Re-survey on epidemiological history of 1 091 probable cases with severe acute respiratory syndrome in Beijing].
abstract: OBJECTIVE
  To know their real epidemiological histories in 1,091 probale cases of severe acute respiratory syndrome (SARS) without definite history of contact with SARS patients in the first survey.
  
  
  METHODS
  All the probable SARS cases until June 9, 2003 without definite history of contact with SARS patients in the first epidemiological survey were included in a re-survey with questionnaire. The second survey was carried out during June 9 to 30, 2003.
  
  
  RESULTS
  The results showed that history of contact with other SARS patients was obtained in 15.9% of 1 091 probale SRAS cases in the second survey, transmission of SARS to others was found in 10.5% of them, and source of infection in hospital was found in 46.5%. Comprehensive judgement based on epidemiological history showed that probale history of contact with SARS patients could be found in 72.9% of 1,091 probale cases of SARS in the second survey.
  
  
  CONCLUSIONS
  Source of infection could be found through additional survey in part of probale cases of SARS without it in initial epidemiological survey.
authors.affiliation: Beijing Health Bureau, Beijing 100053, China.
authors.forename: Ji-yong
authors.initials: JY
authors.lastname: Guo
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Lu
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Shen
authors.forename: Lei
authors.initials: L
authors.lastname: Jia
authors.forename: Jiang
authors.initials: J
authors.lastname: Jiang
authors.forename: Zhen-yong
authors.initials: ZY
authors.lastname: Ren
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Fan
authors.forename: Ming-xue
authors.initials: MX
authors.lastname: Song
authors.forename: Ying
authors.initials: Y
authors.lastname: Deng
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
mesh_terms: D002681:China / Q000453:epidemiology; D016358:Contact Tracing / Q000706:statistics & numerical data*; D006801:Humans; D012189:Retrospective Studies; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology*; D011795:Surveys and Questionnaires