I think the major concern is that the shot was primary lipids and cholesterol and there were concerns about blood clotting and myocarditis. Combine that with the CDC coming out and saying that most people who died from Covid had comorbidities (diabetes, heart disease, obesity ect), then I think a legitimate question arises: could the long term effects of the vaccine be worse off than getting Covid for healthy people?
I can't help but think of Vioxx. Remember it took the FDA over 7 years to say, oops! This drug makes you 200% more likely to die of a heart attack... Our bad...
Most drugs take 5-7 years of safety trials. Bc you can't have longitudinal results without long term studies. To pretend like we know the vaccines are safe over the long term when the amount of time necessary to do longitudinal studies isn't even close to having passed is a bit insulting.