Medicine: Live-Virus Vaccine

The U.S. Public Health Service this week summoned its Committee on Live Poliovirus Vaccine to meet on its Bethesda, Md. campus to study reports of the oral vaccines' safety, potency and effectiveness. The evidence for the panel, headed by PHS's Dr. Roderick Murray, was confusing and often contradictory. The consensus: while live-virus vaccines, taken by mouth (as distinct from the killed-virus, Salk-type vaccine, which must be injected), are indeed promising, there is little chance that any will be licensed for general U.S. use until next summer or later.

A major source of data is...

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