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two doses at weekly intervals and the third or “booster shot” four weeks later. The injections will be given* in the arm.
The object of the vaccine study is to determine whether the amount of antibodies resulting from vaccination will prevent paralytic polio in a child who is exposed to the disease under natural conditions. An integral part of the vaccine study is to determine how long such immunity lasts.
Before being administered to any children, each batch of the vaccine will undergo triple safety tests.
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