File:REPORTED CASES OF LOUSE-BORNE TYPHUS IN THE AMERICAS, 1949-1958.png

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Summary

Reported cases of louse-borne typhus in American countries, for the period 1949-1958.[1] The notable decrease in cases correlates with the development of DDT implementation in the 1940s and 1950s.[2]

Licensing

  1. REDIRECT Template:PD-because
  1. ↑ "REPORTED CASES OF NOTIFIABLE DISEASES IN THE AMERICAS 1949 - 1958" (PDF). paho.org. Retrieved 24 February 2017. 
  2. ↑ "Typhus". britannica.com. Retrieved 3 February 2017. 

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current11:22, 19 April 2017Thumbnail for version as of 11:22, 19 April 2017745 × 616 (39 KB)Sebastian (talk | contribs)Reported cases of louse-borne typhus in American countries, for the period 1949-1958.<ref name="REPORTED CASES OF NOTIFIABLE DISEASES IN THE AMERICAS 1949 - 1958">{{cite web|title=REPORTED CASES OF NOTIFIABLE DISEASES IN THE AMERICAS 1949...
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