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. 2019 Aug 17;70(5):951–957. doi: 10.1093/cid/ciz803

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© The Author(s) 2019. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

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Figure 1. — Sex- and age-specific annualized mortality rates for influenza and pneumonia (P&I) (primary cause) Philadelphia, Pennsylvania, October–December 1918 [15].