A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . lie same cliild on different days. Fourinsertions vcere made in each case, according to the usual practice of official English insertions are usually made by light parallel scratches, two or more in number, and about3-5 mm. iu length. Fig. 1 presents the appearance on the fifth day. The linear depressions in the vesicles indicate thelocation of the ini^ertions of lymph. A faint flush is appearing around each vesicle. Fig. 2 shows the appearance on
A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . lie same cliild on different days. Fourinsertions vcere made in each case, according to the usual practice of official English insertions are usually made by light parallel scratches, two or more in number, and about3-5 mm. iu length. Fig. 1 presents the appearance on the fifth day. The linear depressions in the vesicles indicate thelocation of the ini^ertions of lymph. A faint flush is appearing around each vesicle. Fig. 2 shows the appearance on the eightli day. Fig. 3 presents the appearance at the end of twelve days. In this and in Fig. 2 some supplemen-tary vesicles are shown, a matter of common occurrence. The course of development has beenmore than usually rapid in this case from the eighth to the twelfth day, desquamation beingactive around the vesicles and the brownish coloration of crusts appearing. Fig. 4.—.\ppearance on day. Shows typically the usual method of desiccation of thevesicle. Reference Handbook OF THE Medical Sciences. Plate FIG. 3. TWELFTH Or, PRIMARY VACCINATION. (Redrawn imth curreclions from Plate slwum in British Mrdical Journal, Iitly 1902.) REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. its influence by repetition. Revacciuation, therefore, aslie it, forms an essential part of the measuresof prevention against smallpox, and its hygienic impor-tance extends not only to the individual, but also to so-ciety, the relative immunity of which is warranted onlyby the immunity of the individual from smallpox. Hereckons the protective period of primarj vaccination atan average of ten years, and therefore believes the revae-cinatiou of school children in the later years of school lifeto be essential to complete immunity. Dr. Seaton sums up the purposes of revaeeinatiim asfollows: 1. To repair whatever was irregular in the course of aprimarj- vaccin
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