Fig. 2. Comparison of age-specific mortality from H5N1 “Bird Flu” and H1N1 “Spanish Influenza” viruses. Bar graph shows proportions of confirmed fatal and non-fatal human H5N1 cases by 10-yr age cohort as of September 2007 (data from WHO Regional Pacific Office, WHO Epidemic and Pandemic Alert and Response Network). Line graph (after Murray et al. 2006) shows estimated age specific excess mortality rates from the 1918-1919 H1N1 Spanish Influenza pandemic.