Bulletin of the World Health Organization

Entry and exit screening of airline travellers during the A(H1N1) 2009 pandemic: a retrospective evaluation

Kamran Khan, Rose Eckhardt, John S Brownstein, Raza Naqvi, Wei Hu, David Kossowsky, David Scales, Julien Arino, Michael MacDonald, Jun Wang, Jennifer Sears & Martin S Cetron

Volume 91, Number 5, May 2013, 368-376

Table 1. Pandemic A(H1N1)-related online media activitya and deviations in international air traffic arriving in and departing from Mexico, March to August 2009

Month in 2009 Percentage change in online media reportingb Percentage change in international arrivalsc Percentage change in
international departuresc
March −11.9 −11.5
April +395 +2.6 +3.5
May +635 −37.8 −39.2
June +354 −18.9 −23.6
July +270 −11.4 −13.7
August +402 −8.4 −8.8

a Online news stories collected and translated by the Global Public Health Intelligence Network in Arabic, traditional and simplified Chinese, English, French, Portuguese, Russian, Spanish, and that included any of the following key words: H1N1, influenza, swine flu, epidemic or pandemic.

b Percentage change in online news indexed to baseline levels in March 2009 (i.e. before international awareness of the A(H1N1) 2009 influenza pandemic).

c Change in traveller volumes to and from Mexico are indexed to the corresponding months in 2008.