Today October 28 marks 100th birth anniversary of Dr Jonas Salk the genius scientist who developed Polio vaccine suggesting that inactivated virus could confer immunity in healthy individuals without causing the disease. Today's Google Doodle shows kids merrily holding up a board that says Thank you Dr Salk. The tribute truly reminds us of the immense contribution that Dr Salk made to healthcare for without his work Polio would caused a greater damage to the world. The fact that he didn t choose to patent his vaccine made him a true hero. In 1950s when the U.S was fighting its
