[ptaipale]

Even 0.5 % fatality rate is huge, in my opinion.

For polio, only 0.5 % of those who contracted polio had nervous system symptoms. Of this small minority that developed muscle weakness, about 2 to 5 percent of children and 15 to 30 percent of adults died.

Still, it was a frightening disease, until it was eradicated by vaccines (except where it wasn't: now that covid has brought the world's focus back to vaccines, we should do something about that, too.)