-
born
he was born in new york -
high school
he graduated high school -
graduated
he graduated from high school -
polio
people started getting polio -
intership
he got a intership -
moved
he moved to pittsburgh in 1942 -
vaccine
jonas salk started handing out the new and in proved polio vaccine -
promotion
jonas edward salk got a promotion -
decreasing
the polio started decreasing -
divorce
jonas salk got devorce -
death
