Make up your own mind--but I'm a big proponent of polio vaccine. (Just not the oral version that occasionally caused polio.)
@ludin49 I never heard of that before. Why were both necessary? I assume it's deemed effective even if versions are mixed..
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@SharylAttkisson. Not sure why. My aunt was a nurse and gave us the injection. Later received the sugar cube with vaccine at school.Thanks. Twitter will use this to make your timeline better. UndoUndo
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