In one year...ONE YEAR...in the US ALONE there were 57,628 reported cases with 3,145 deaths.
The panic back then, of parents who had no idea how it was communicated, or if their child had been exposed is something we have a difficult time understanding today.
It is something to be sad about. But it isn't something to sue over. There were a lot of parents whose children were crippled to varying degrees or killed outright who would have given their life savings to give their child even a chance at the vaccine if it had been developed.
Criticism of vaccines is fine. But there is another side to these things, and that should be kept in mind.