The history of the polio vaccine
On April 12, 1955, virologists announced that they had developed a safe and potent vaccine against poliothe deadly, paralyzing disease which then tortured thousands of people in the US Launching…
On April 12, 1955, virologists announced that they had developed a safe and potent vaccine against poliothe deadly, paralyzing disease which then tortured thousands of people in the US Launching…