The scientific courts judging the Salk polio vaccine have had an exasperating way of reversing themselves. Now it's safe, now it isn't. Now it works, now it doesn't quite. In Kansas City last week, 6,000 members of the American Public Health Association listened to further testimony on how effective the Salk vaccine proved itself in last summer's mismanaged mass inoculations.
The verdict was that the vaccine was generally safe and effective. Normally cautious Epidemiologist Alexander Langmuir of the U.S. Public Health Service reported, on the basis of returns from eleven states plus New...
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