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JAMA. 1891;XVI(21):746. doi:10.1001/jama.1891.02410730026004.
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Michigan State Board of Health.  The annual meeting of the Michigan State Board of Health was held at the Capital, Lansing, Mich., April 14, 1891. Prof. Fall, Drs. Avery, Hazlewood, Vaughan and Baker were present. Dr. Avery was reëlected president.Dr. Vaughan reported that, at the State Laboratory of Hygiene, he has made analyses of all the different kinds of baking powder found in the market, also of one hundred and twelve samples of water from different parts of the State, and that he was ready to report the results, also of his researches on typhoid fever.Dr. Baker reported that he had worked out the cause of influenza. He said its greatly increased prevalence during the last three months is alarming because so many other diseases follow that disease, and increase after it increases, the diseases which so increase being consumption, pneumonia, cerebro-spinal meningitis, rheumatism, osteo-myelitis, etc., influenza seeming


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