File:Reported cases of influenza in American countries for the period 1949-1958.png
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Summary
Reported cases of influenza in American countries for the period 1949-1958, illustrating the severity of influenza A virus subtype H2N2 pandemic in 1957. Chile (not shown in the graph) was severely hit and reported 1,408,430 cases in 1957.[1]
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- ↑ "REPORTED CASES OF NOTIFIABLE DISEASES IN THE AMERICAS 1949 - 1958" (PDF). paho.org. Retrieved 22 February 2017.
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current | 22:16, 21 April 2017 | 804 × 701 (72 KB) | Sebastian (talk | contribs) | Reported cases of influenza in American countries for the period 1949-1958, illustrating the severity of influenza A virus subtype H2N2 pandemic in 1957. Chile (not shown in the graph) was severely hit and reported 1,408,430 cases in 1957.<ref... |
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