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Airport Screening Unlikely To Prevent Spread Of SARS Or Influenza

Date:
September 27, 2005
Source:
BMJ-British Medical Journal
Summary:
Screening passengers as they arrive at UK airports is unlikely to prevent the importation of either SARS or influenza, finds a study published online by the British Medical Journal.

Screening passengers as they arrive at UK airports is unlikely toprevent the importation of either SARS or influenza, finds a studypublished online by the British Medical Journal.

In the event of a new SARS or influenza epidemic, air travel wouldrepresent the principal route of international spread. Although airportentry screening has been advocated, its benefit is currently unknown.

Using the incubation periods for influenza and SARS,researchers at the Health Protection Agency estimated the proportion ofpassengers with latent infection who would develop symptoms during anyflight to the UK.

For SARS, they found that the incubation period was too long toallow more than a small proportion of infected individuals to developsymptoms during a flight to the UK (0-3% for European flights and amaximum of 21% for the longest flights from East Asia).

Although influenza has a much shorter incubation period thanSARS, the average predicted proportion of people infected withinfluenza and progressing during any flight was still less than 10%.

Because the proportion of individuals detected is highest fromcities with the longest flight duration, screening passengers from theFar East and Australasia derives the most benefit. But, even then, thesensitivity for cities in these areas would still be low, explain theauthors.

Early screening is unlikely to be effective in preventing the importation of either SARS or influenza, they conclude.

Although adopting a policy of quarantining all exposedpassengers on the detection of a single case could substantiallyincrease the benefit of entry screening, this still leaves the problemthat the sensitivity of entry screening is low.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

BMJ-British Medical Journal. "Airport Screening Unlikely To Prevent Spread Of SARS Or Influenza." ScienceDaily. ScienceDaily, 27 September 2005. <www.sciencedaily.com/releases/2005/09/050927080031.htm>.
BMJ-British Medical Journal. (2005, September 27). Airport Screening Unlikely To Prevent Spread Of SARS Or Influenza. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2005/09/050927080031.htm
BMJ-British Medical Journal. "Airport Screening Unlikely To Prevent Spread Of SARS Or Influenza." ScienceDaily. www.sciencedaily.com/releases/2005/09/050927080031.htm (accessed August 20, 2014).

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