Small-pox : how it is spread and how it may be prevented. Drawn from the facts of the Warrington small-pox epidemic of 1892-93 / by James Wallace.

  • Wallace, James
Date:
1902
Catalogue details

Licence: In copyright

Credit: Small-pox : how it is spread and how it may be prevented. Drawn from the facts of the Warrington small-pox epidemic of 1892-93 / by James Wallace. 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.

    49/98 page 37
    CHAPTER IV. The effects upon small-pox of re-vaccination ; con- current vaccination ; a previous attack of small-pox ; the supposed ill-effects of small-pox, and the character of vaccination scars, fall to be considered next. The influence of Re-vaccination upon Small- pox. In houses invaded by small-pox, there lived sixty- three persons who had been re-vaccinated. Of these (excluding one who had previously had small-pox), seven were attacked. This is a percentage of 11.1. As compared with this, we find that of those who had small-pox previously the percentage attacked was 12.2. This brings out the very remarkable fact that re-vaccination affords more protection against small-pox than a previous attack of the disease does. In the seven cases, the several intervals between re-vaccination and the attack of small-pox were: seven years, eight years, fifteen years, twenty years, twenty-two years, twenty-five years, and twenty-seven
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