The chart in this December 21, 1918 newspaper article published in The Logan Republican shows the impact of the use of face masks in flattening the curve of new Spanish Flu cases in Logan, Utah. The article notes "there was a rapid increase of cases and quarantines for four days after the mask was put into use, or until the 24th day of November, at which time the masks apparently began to become effective"(Logan City, 1918, p. 1).
Image on Right: Logan Republican
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