[Re-survey on epidemiological history of 1 091 probable cases with severe acute respiratory syndrome in Beijing].
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.
Guo
Ji-yong
JY
Beijing Health Bureau, Beijing 100053, China.
Lu
Hong-yan
HY
Shen
Zhuang
Z
Jia
Lei
L
Jiang
Jiang
J
Ren
Zhen-yong
ZY
Wang
Dong
D
Fan
Yong
Y
Song
Ming-xue
MX
Deng
Ying
Y
Ma
Yan
Y
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