Cutter Incident (1955)
A batch of polio vaccine made by Cutter Laboratories was released containing live poliovirus. About 40,000 children who received vaccine from affected lots developed polio, 164 were paralyzed, and 10 died.
The federal government halted all polio vaccination within weeks and created a national vaccine safety oversight system.
The incident established the framework for federal vaccine licensure and safety monitoring that still operates in modified form today.
It was the first major U.S. vaccine safety crisis, and the federal safety apparatus it created is what the new HHS initiative is now reshaping.
