The Lancet
Jan 16, 2010  Volume 375  Number 9710  Pages 171 – 252
http://www.thelancet.com/journals/lancet/issue/current

Correspondence
Risk factors for H1N1 influenza complications in 2009 Hajj pilgrims
Philippe Gautret, Philippe Parola, Philippe Brouqui

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Z A Memish and colleagues (Nov 21, p 1786)1 describe the outcome of a consultation between Saudi Arabia and WHO that resulted in a plan to mitigate the transmission of influenza A H1N1 at the 2009 Hajj pilgrimage to Mecca. Of these recommendations, the most challenging was the one suggesting that the population groups at highest risk of the complications of influenza (pregnant women, those with chronic diseases, and people younger than 12 years or older than 65 years) voluntarily refrain from the 2009 Hajj…