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Henry B. Baker, M.D.
JAMA. 1888;X(15):475. doi:10.1001/jama.1888.02400410031013.
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Dear Sir:  —On page 397 of The Journal, March 31, is a "formula for the prevention of diphtheria," which is: "an abundance of pure air, good water, wholesome food, clean soil and a clean personality." Have you not accidentally given the wrong formula? Very extensive observation of statistical and other reports on this subject seems to show that diphtheria is about as prevalent among those who employ this formula as among those who do not; while the statistics are conclusive in proving that under another formula the disease is preventable. On page 489 of The Journal, Oct. 15, 1887, is a diagram, which shows that in 102 outbreaks of diphtheria in which isolation or disinfection or both were neglected, there was an average of a little over sixteen cases and three deaths to the outbreak, that during the same time in 116 outbreaks in which isolation and disinfection were both


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