On April 12, 2015, the world will celebrate the 60th anniversary of Jonas Salk’s vaccine that helped defeat a contagious, crippling virus.
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On April 12, 2015, the world will celebrate the 60th anniversary of Jonas Salk’s vaccine that helped defeat a contagious, crippling virus.
You can read this story + 2 more free this month
This story is on us. Create a free account to keep reading.
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