Medicine: Search for a Virus

Scientists are sure that infantile paralysis is caused by a virus. They have long known where to look for it—in the brain and spinal cord. But isolation of the elusive virus itself has led researchers on one of the most expensive searches in medical history. Last week two Stanford University scientists, backed by the National Foundation for Infantile Paralysis, thought they had finally come near the end of the trail.

Stanford Chemists Hubert S. Loring and C. E. Schwerdt had pondered a strange puzzle. Like other polio virus hunters, they had ground up and...

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