In further effort to prevent the invasion of the United States by yellow fever, the importance of the discovery of the exact cause of the disease, which up to the present time has been undetermined, is obvious, and to this end a systematic bacteriological investigation should be made.
William McKinley: “In further effort to prevent the invasion of the United States by yellow fever, the importance of the discovery of the…”
Editor's note · Context
McKinley emphasizes the importance of identifying the cause of yellow fever to prevent its spread.
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To the House of Representatives: I transmit herewith a report from the Secretary of State in response to the resolution of the House of Representatives of February 19, 1901.





