To add to its other inoculations,* the entire U. S. Army is to be vaccinated against yellow fever. Secretary Stimson gave the order last week. The vaccine, developed in 1936 by the Rockefeller Foundation, is made from yellow-fever virus grown on chick embryos. One dose immunizes against the deadly, mosquito-borne disease for at least two to three years.
* Typhoid, paratyphoid, smallpox, tetanus.
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