Chronicle. Volume 29, No. 10 (1933)
Kazan medical journal ›› 1933, Vol. 29 ›› Issue (10) : 840 -842.
Chronicle. Volume 29, No. 10 (1933)
For the purpose of a comparative study of the effectiveness of diphtheria vaccinations, at the initiative of the hygiene section of the League of Nations, in 1929-1931. in a number of countries (Germany, England, Denmark, France, Hungary, Holland, Poland, Romania and Czechoslovakia), parallel experiments of vaccination of children were organized according to a single plan.
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