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Bitmap Image  |  1997-05-08  |  141KB  |  432x324  |  8-bit (91 colors)
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OCR: Polio Vaccination About Polio Polio is disease that attacks the nervous systerm, sometimes resu lting in paral lysis of the legs and arrms. For centuries palio spread unc] :hecked, especially among young children. Relief finally came ir the 1950s when scientist Jonas Salk developed vaccine to fight polio In a huge [IOM dwide Haja millions f schoolchildren were given the vaccine Today the spread of polio is under control paralysis arms worldwide HOja schoolc