polio vaccine experimental

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1. Vaccines for polio, typhus, AIDS that Jonas Salk and other scientists

   

2. Amid debate about vaccines, polio remembered as a scourge defeated

   

3. Newly designed vaccine may help stamp out remaining polio cases

   

4. The health game changers of the last 500 years

   

5. Amid debate about vaccines, polio remembered as a scourge defeated

   

6. Tainted Cutter polio vaccine killed and paralyzed children in 1955