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Related Experiment Videos

Border screening for SARS.

Ronald K St John1, Arlene King, Dick de Jong

  • 1Centre for Emergency Preparedness and Response, Health Canada, 100 Colonnade Road, Ottawa, Ontario K1A 0K9, Canada. rstjohn@hc-sc.gc.ca

Emerging Infectious Diseases
|February 12, 2005
PubMed
Summary
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Canada

Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Travel Medicine

Background:

  • Severe acute respiratory syndrome (SARS) spread internationally in 2003.
  • Screening departing passengers for SARS symptoms was recommended by the World Health Organization.
  • Canada implemented airport screening measures for SARS.

Purpose of the Study:

  • To evaluate the effectiveness of SARS screening measures at Canadian international airports.
  • To assess the impact of SARS screening on international travel.
  • To analyze the detection rate of SARS cases through passenger screening.

Main Methods:

  • Implementation of SARS symptom and sign screening for airplane passengers at selected Canadian airports.
  • Data collection on screened passengers and detected SARS cases.

Related Experiment Videos

  • Analysis of screening outcomes in relation to SARS prevalence.

    • Main Results:

    • Despite intensive screening efforts, no SARS cases were detected among departing passengers.
    • The prevalence of SARS was extremely low during the screening period.
    • The positive predictive value of the screening measures was found to be essentially zero.

    Conclusions:

    • Available screening measures for SARS at international borders demonstrated limited effectiveness.
    • The low prevalence of SARS significantly impacts the utility of screening for case detection.
    • Further evaluation of border screening strategies for emerging infectious diseases is warranted.