For Clarence Gibbs, Jonas Salk, and a handful of other researchers, 1989 was a glowing year, and 1990 promises to be even brighter.
by Jon Cohen | Jan 11, 1990
The live-virus "vaccine of choice" is the leading cause of polio infection in the U.S. The older Salk vaccine, which does not cause infection, is considered equally effective but is not widely used anymore. How did this happen? What's being done about it?
by Jon Cohen | May 28, 1987
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