Volume 18, Number 1—January 2012
Research
The 1918–19 Influenza Pandemic in Boyacá, Colombia
Figure 3
![](/eid/images/10-1969-F3.jpg)
Figure 3. Age-stratified weekly all-cause mortality rates per 10,000 population in Boyacá, Colombia, 1917–1920. Background mortality rate derived from a seasonal regression model (blue); corresponding 95% CI curves are shown (red and green). Deaths in excess of the upper limit of the background mortality rate curve are deemed attributable to the 1918–19 influenza pandemic.
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