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. Author manuscript; available in PMC: 2011 Sep 27.
Published in final edited form as: Crit Care Med. 2010 Apr;38(4 Suppl):e10–e20. doi: 10.1097/CCM.0b013e3181ceb25b

Figure 1.

Figure 1

A, Three pandemic waves were observed in many locales in 1918 to 1919, as in these data from Breslau, Silesia (now Wroclaw, Poland), documenting monthly influenza mortality from June 1918 through December 1922. The figure is reproduced from data of Lubinski (21), on which we have superimposed indications of the three 1918 to 1919 “waves” (W1, W2, and W3) and the first three annual winter postpandemic recurrences of 1919 to 1920 (R1), 1920 to 1921 (R2), and 1921 to 1922 (R3). B, Age-specific influenza mortality, Breslau, October 1918 to April 1922. The dark blue line combines influenza mortality in W2 and W3 of 1918 to 1919. The light blue line reflects influenza mortality in the first winter recurrence of January to April 1920 (R1). The orange line reflects influenza mortality in the R3 winter recurrence of December 1921 to April 1922. The young adult mortality peak, documented worldwide, is evident in the W2 + W3 and R1 curves of 1919 to 1921 but has completely disappeared by 1922.