Excerpt from Transactions of the International Medical Congress, Vol. 4 of 4: Seventh Session Held in London, August 2d to 9th, 1881, Prepared for Publication Under the Direction of the Executive Committee Following immediately upon this startling recurrence of the disease in my own family came other instances, showing in an equally forcible manner the complete absence of any protective power exerted by the previous epidemic. In two other families, numbering seven children in all, six had measles in the first epidemic, eleven months before, at the same time, and contracted from the same source, as my own children 3 the seventh child had had the complaint a year earlier. These seven children were all exposed in like manner to the contagion of the new epidemic; all took the disease again without exception not one escaped. Again, three children of another family, under my immediate observation, who had had measles of severe type three years previously, were exposed to the contagion of the second epidemic, and from the same source as those above mentioned. All took the complaint and had it severely. Thus it came about that, of the first fifteen cases of the second outbreak which came under my notice, no less than thirteen had had measles before, and nine of the thirteen under my own eye within the year. Altogether I have been able to obtain a trustworthy history of thirty cases. Of these, eighteen came under my own observation at the time 3 the remaining eleven, although not seen at the time of eruption, occurred in individuals with whom I am acquainted, have been carefully investigated, and are thoroughly reliable. Out of this total of thirty cases of the second epidemic, twenty-two had certainly had measles previously. The protected individuals suffered equally with those who were exposed to the contagion for the first time. They took the disease just as readily 3 they had it just as severely. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.