Prevention of Smallpox by Vaccination and Revaccination
نویسنده
چکیده
PREVENTION OF SMALLPOX BY VACCINATION AND REVACCINATION Sir,?In reference to the paper entitled ' Prevention of Smallpox by Vaccination and Revaccination' published in the May 1945 issue of your esteemed journal I beg to further supplement my observations by offering the following hypothesis regarding the conception of immunity and its fluctuations, conferred by smallpox vaccination and revaccination. The hypothesis is based on the observations discussed in the article and is further strengthened by the field experience during the recent outbreak of smallpox in certain rural areas of
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