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Open Access Highly Accessed Research article

Entry screening to delay local transmission of 2009 pandemic influenza A (H1N1)

Benjamin J Cowling*, Lincoln LH Lau, Peng Wu, Helen WC Wong, Vicky J Fang, Steven Riley and Hiroshi Nishiura

BMC Infectious Diseases 2010, 10:82  doi:10.1186/1471-2334-10-82

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So there's no evidence of benefit, then?

Peter English   (2010-08-05 12:52)  Personal comments - not those of my employer email

The conclusion starts "In conclusion, our results suggest that entry screening could delay local transmission for an additional 1-2 weeks" (and in the abstract "Entry screening may lead to short-term delays in local transmission of a novel strain of influenza virus"). Yet the results section states that the 95% confidence interval includes zero, and the discussion starts "Our results suggest that entry screening did not lead to substantial delays in local H1N1 transmission".

I take home the message: there is no evidence that entry screening delays the transmission of H1N1 in a country. This could be because it doesn't; or it could be because studies designed to look for such evidence have been under-powered to detect it.

Competing interests

None

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