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Volume 12, Number 4—April 2006
Research

1951 Influenza Epidemic, England and Wales, Canada, and the United States

Cécile Viboud*Comments to Author , Theresa Tam†, Douglas Fleming‡, Mark A Miller*, and Lone Simonsen*
Author affiliations: *National Institutes of Health, Bethesda, Maryland, USA; †Public Health Agency of Canada, Ottawa, Ontario, Canada; ‡Royal College of General Practitioners, Harborne, Birmingham, United Kingdom

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Figure 2

Time series of monthly mortality from pneumonia and influenza (P&I, represented as death rate/100,000) from 1950 to 1972 in A) Canada and B) England and Wales. Black line: observed deaths, Red line: baseline deaths predicted by a seasonal regression model. Note the 2 arrows for the 1968 pandemic in England, representing the 2 waves of the smoldering A/H3N2 pandemic (1968–69 and 1969–70, respectively) (18).

Figure 2. Time series of monthly mortality from pneumonia and influenza (P&I, represented as death rate/100,000) from 1950 to 1972 in A) Canada and B) England and Wales. Black line: observed deaths, Red line: baseline deaths predicted by a seasonal regression model. Note the 2 arrows for the 1968 pandemic in England, representing the 2 waves of the smoldering A/H3N2 pandemic (1968–69 and 1969–70, respectively) (18).

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