American physician and medical researcher Jonas Salk was born on oct 28 1914.
He developed the first safe and effective vaccine for polio.
Watch the video to know what else happened on this day in history.
#JonasSalk #Polio #Vaccine
American physician and medical researcher Jonas Salk was born on oct 28 1914.
He developed the first safe and effective vaccine for polio.
Watch the video to know what else happened on this day in history.
#JonasSalk #Polio #Vaccine