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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

Main Article

Table 2

Comparison of influenza-related death rates in the 1951 influenza epidemic (A/H1N1) and 1957 influenza pandemic (A/H2N2), Canada, England and Wales, and United States*

Setting Age group P&I† excess death rate/100,000 (RR‡) All cause excess death rate/100,000 (RR‡)
Canada (13.7 million)§
1951 epidemic (Jan –Apr) All ages 18.6 (1.54) 34.1 (1.47)
<65 y 6.6 (0.90) 14.8 (1.09)
>65 y 164 (2.41) 329 (2.22)
1957 pandemic (Sep–Dec) All ages 12.1 (1.00) 23.2 (1.00)
<65 y 7.3 (1.00) 13.6 (1.00)
>65 y 68.0 (1.00) 148 (1.00)
England & Wales (43.8 million)§
1951 epidemic (Jan –Mar) All ages 50.1 (1.40) 178 (1.45)
1957 pandemic (Oct 1957–Mar 1958) All ages 35.8 (1.00) 123 (1.00)
United States (154.9 million)§
1951 epidemic (Feb–Apr) All ages 5.5 (0.48) 9.0 (0.25)
1957 pandemic (Oct 1957–Mar 1958) All ages 11.5 (1.00) 36.3 (1.00)

*Unadjusted death rates (see Figure 3 for rates adjusted for demographics and trends in health care and socioeconomic status).
†P&I, pneumonia and influenza.
‡RR, ratio of excess death rate in 1951 to excess death rate in 1957.
§Population in 1951.

Main Article

Page created: January 23, 2012
Page updated: January 23, 2012
Page reviewed: January 23, 2012
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