University of Illinois at Chicago

2. M. Greenwood. “The Vaccination Problem”.  Journal of the Royal Statistical Society, Vol.93, No.2. 1930.

3.  Scott, Susan.  “The Dynamics of Smallpox Epidemics in Britain, 1550-1800”. Demography, Vol. 30, No. 3, August 1993.

4.  Milnes, Alfred.  “Statistics of Smallpox and Vaccination, with Special Reference to Age-incidence, Sex-incidence, and Sanitation”.  Journal of the Royal Statistical Society, Vol. 60, No. 3. September, 1897.

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ta”.  Publications of the American Economic Association, 3rd Series, Vol. 7, No. 3.  August 1906.

6.  Encyclopedia Britannica online. http://www.britannica.com/

7.  Krause, J. T. “Changes in English Fertility and Mortality, 1781-1850”.  The Economic History Review, Vol. 11, No. 1. (1958).

8.  The National Anti-Vaccination League. (NAVL) “For and Against Vaccination”.  London, 1910.

9.  National Vaccine Information Centre. NVIC.COM