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Dr. Thorne Thome handed us a table founded (a) on information
given in the 36th volume of the Medico-Chirurgical
Society's Transactions by Mr. Marson, as the result of his
observations made during the years 1836 to 1851 on 3,094 cases
of post-vaccinal Small-Pox, and (b) on data derived from Mr.
Marson's evidence before the Vaccination Committee of 1871,
based on a further experience of 10,661 such cases, and covering
the years 1852 to 1867.
Percentage of Deaths Percentage of Deaths
in each Class respec- in each Class respecCases
of Small-Pox classified according to tively ; Uncorrected, tively; Corrected.
the Vaccination Marks borne by each Patient
respectively.
1836-51. 1852-67. 1836-51. 1852-67.
1. Stated to have been vaccinated, but
having no cicatrix .25-5 40. 3 21.7 39. 4
2. Having one vaccine cicatrix 9. 2 14. 8 7. 6 13. 8
3. Having two vaccine cicatrices 6. 0 8. 7 4..3 7.7
4. Having three vaccine cicatrices 3. 6 3. 7 1.8 3. 0
5. Having four or more vaccine cicatrices 1.1 1. 9 0.7 0. 9
Unvaccinated 37.5 35.7 35.5 34.9
Taken together, the number of cases, classified according to
the marks found on the patients, is very considerable; it exceeds
20,000. Apart from Mr. Marson's cases the number is 6,839.
Dealing with this number, they being all cases in which the
observations were made in very recent years, and dividing into
classes according to the number of marks, we obtain the following
result:—