Who invented the Polio vaccine? A) Jonas Salk B) Burk Holder C) Robert Koch D) Albert Sabin Related MCQs: According to USA scientists, BCG vaccine is useful for the treatment of COVID-19.This vaccine primly against …..? Polio is caused by ……? What causes polio? Recently which country has announced to provide $4.57m grant to help Pakistan for Polio eradication?