That measles and rubella are separate and distinct diseases is now an accepted fact; that many physicians fail correctly to differentiate in their diagnosis of these two diseases is also equally true.
In taking the history of cases errors frequently occur because of this failure to diagnose properly. So true is this that when I ask whether a child has had measles I also enquire as to the symptoms. As the two diseases present a different clinical course, it seems to me that in the interest of exact science the correct distinction should be made. For this reason I present this brief paper for consideration.
In the spring of 1894 there occurred an endemic of rubella, or German measles, in Omaha. I had the opportunity to observe and study a number of these cases. I made notes of twenty-seven cases in which I had the opportunity of seeing the patients
McCLANAHAN HM. DIFFERENTIAL DIAGNOSIS BETWEEN MEASLES AND RUBELLA. JAMA. 1907;XLIX(23):1916–1918. doi:10.1001/jama.1907.25320230032001h
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