The polio vaccine was deemed 80 to 90% effective in 1955, leading to its widespread acceptance and eventual eradication of the disease in the U.S.
Experts warn that revoking the current polio vaccine's approval, due to lack of placebo testing, could lead to disastrous outbreaks of the virus.
Dr. Walter Orenstein emphasized that due to asymptomatic cases, polio could spread undetected, causing paralyzing outcomes in the unvaccinated population.
Jonas Salk opposed placebo use in trials, prioritizing immediate access to lifesaving vaccines over ethical considerations regarding testing.
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