Medicine: News from Salk

In Rome University's Orthopedic Clinic, 1,133 polio experts from 49 nations gathered last week, but the vital question —how good is the Salk vaccine? —was not even on the agenda. Although masses of statistics and case reports on the vaccine trials (TIME, March 29) are piling up, no conclusive answer can be culled from them until next year. Meanwhile. Dr. Jonas E. Salk reported to his colleagues in Rome, he has already gathered new data that will dictate changes in any future attack on polio with a vaccine similar to his.

It may be necessary to pick different strains of virus to...

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