Who developed the first widely used inactivated polio vaccine?

The first widely used inactivated polio vaccine was developed by the American physician Jonas Salk in the early 1950s.12

Working as the director of the Virus Research Laboratory at the University of Pittsburgh, Salk led a research team that utilized a method to cultivate the poliovirus in monkey kidney tissue to produce large quantities of the vaccine. Known as the inactivated poliovirus vaccine (IPV) or the Salk vaccine, it contained virus that had been inactivated by treatment with formaldehyde.13452

Following a massive nationwide field trial involving 1.8 million children, the vaccine was declared a success on April 12, 1955, and subsequently licensed for broad use. Its introduction led to a dramatic decline in the incidence of paralytic polio in the United States.1532