The country scrambled to produce and disseminate the vaccine as quickly as possible. Alas, this happy ending comes with an asterisk. The first big batch of vaccine wasn’t properly made. Cutter Laboratories in California, one of the main producers of the vaccine, inoculated more than 200,000 children in 1955, and within days there were reports of paralysis. Within a month, the program was discontinued, and investigations revealed that the Cutter vaccine had caused 40,000 cases of polio, leaving 200 children with varying degrees of paralysis and killing 10.
