@ujm
I missed your comment about Polio. Polio was more dangerous but not nearly as dangerous as we typically think. A large majority of cases had no symptoms. And the vast majority of symptomatic cases were minor. But unlike today, there wasn’t mass testing for positive cases so people focused on the serious symptomatic cases.
Regardless the risk of the Covid-19 vaccine is far lower than the risk of the disease.
I think the push for the vaccine universally is quasi-medical. They don’t have a good means of determining who had the disease in the past and they don’t want to encourage people to try and seek infection to get natural immunity.