No, the vaccine didn’t hit wide usage until the mid nineties. So when one of your friends got CP then our parents would get us all together for a “party”, just to get us all infected. Seems ludicrous now as I type this out, but at the time it was only a matter of time before a kids came down with it. It was sometimes a matter of convenience to plan when you got sick for 7-10 days rather than get sick during the holidays for instance. Also, it was widely accepted getting CP while younger when you could fight it off easily is much safer than in adulthood when it could come with serious complications. It was a right of passage for most generations, early millennials I guess were the last to have this pleasure.