"Yes, that is why long term studies are done. Vaccine as a methodology has been proven effective. Many diseases are non-existent now thanks to it."

But aren't the new vaccines of a different kind? Genetically engeneered?

So I too had my doubts, before getting the shot. And I still do. But what I do know for example is, that I had strong side effects after the first dose. And also strong side effects just before my second shot of Astra. In other words, the mind is a strong factor here and the body is used to deal with alien dna all the time, so I do not worry too much about long term effects.