Volume 1

Reports of the Royal Commission appointed to inquire into the subject of Vaccination; with minutes of evidence and appendices / Vaccination Commission.

  • Great Britain. Royal Commission on Vaccination.
Date:
1889-1897
Catalogue details

Licence: Public Domain Mark

Credit: Reports of the Royal Commission appointed to inquire into the subject of Vaccination; with minutes of evidence and appendices / Vaccination Commission. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    those having foveated scars. By looking to the death rates the results bear out a similar conclusioi:. TABLE XVI. Foveated. Unfoveated. No. of Scars. Cases. Deaths. Mor- tahty per Cent. Cases. Deaths. Mor- tality per Cent. One scar Two scars - Three scars - Foiir scars - 151 214 2.39 312 5 3 2 3 3-3 1-4. 0-8 0-9 119 lOG 102 140 2 8 3 2 1- 6 7-5 2- 9 1-4 Totals - 916 13 1-4 467 15 3-2 These results indicate that foveation of cicatrices is superior in protecting against death as compared with unfoveated scars. Taking, lastly, into consideration the influence of the combined area of the vaccination scars upon the nature of attack, the following are the results:— TABLE XVII. Area of Scars under •25 sq.in. Area of Scars from 25 to 5 sq. in. Area of Scars over .5 sq. in. Age Periods. Dis- crete. Se ifere and Con- fluent. Dis- crete. Severe and Con- fluent. Dis- crete. Severe and Con- fluent. 0 to 1 year 0 0 0 0 0 0 1 to 5 years 3 0 2 0 1 0 5 to 10 years 10 1 16 1 16 0 10 to 15 years 16 1 26 1 62 0 15 to 20 years 21 2 38 0 140 1 20 to SO years 57 5 112 4 252 12 30 to 40 years 41 11 78 8 106 6 40 years and over - 54 7 52 1 38 4 Totals 202 27 323 15 615 23 If these figures are worked out so as to show the per- centages of severe and confluent attacks at all ages when the area of the vaccination scar is respectively under -25 square inch, from '25 to '5 square inch, and over '5 square inch, the following table is obtained :— TABLE XVIII. An Ages. Area of Scars under •25 sq. in. Area of Scars from '25 to •5 sq. in. Area of Scars over -5 sq. in. Per-centages of 11-7 4-4 3-6 severe and con- flueut attacks or, if the figures are worked out so as io show the per- centages of very mild attacks at all ages, when the area of the vaccination scars is respectively under •2-5 square inch, from '25 to '5 square inch, and over '5 square inch, the following Table is obtained :— TABLE XIX. All Ages. Area of Scars under • 25 sq. in. ! Area of Scars -0 ^ . Area of ocarn trom • 25 to 1 ^ over ■ 5 sq.in. • 5 sq. m. ^ Per-centages of very mild attacks 0-4 2-9 2-5 Reducing the figures of Table XVII to proportions of discrete to confluent attacks, the results are as follows :— TABLE XX. Area of Scars. Proportion of Discrete to Confluent case*. Area of scars under ^25 sq, in 7 Discrete cases to 1 Confluent Area of scars from • 25 to • 5 sq. in. Area of scars over '5 sq. in. 26 „ By looking to the death rates similar results *r obtained:— TABLE XXI. Area of Scars. Cases. Deaths. Mortality per Cent. Area of scar under •25 229 5 2-1 sq. in. Area of scars from ■25 338 6 1-r to 5 sq. in. Area of scar over •S sp. 638 10 1.5 in. The results shown in Tables XVIII., XIX., XX., and XXI. show that the greater the combiuei area of the vaccination scars the greater is the protection against a bad attack of small-pox, and also the lower is the death- rate. Diagram showing the Proportion of Cases of Small-pox of the Mild (including very mild and Discrete Cases), and bevere (including Severe Discrete, Confluent, and Htemorrhagic Cases) Types respectively, which occurred m Persons at all Ages of difi^erent classes in the London Small-pox Outbreak from September 1st, 1892, to July olst, 1893. All Classes. Vaccinated. QBEliBQBDaO -A jHBH Unvaccinated. Severe. □ Mild. □□□□□OB i □□□□ ^> DDE □