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From: Unmasking Masks in Makkah: Preventing Influenza at Hajj

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1 From: Unmasking Masks in Makkah: Preventing Influenza at Hajj
Figure 1. Comparison between mask and control groups in randomized controlled trials. Abbreviations: CI, confidence interval; df, degrees of freedom; M-H, Mantel–Haenszel. From: Unmasking Masks in Makkah: Preventing Influenza at Hajj Clin Infect Dis. 2012;54(1): doi: /cid/cir826 Clin Infect Dis | © The Author Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved. For Permissions, please 1


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