What if some people do not get horrible side effects from either having the Covid virus or getting the jab, at this time.

But what if years pass while the virus or vaccine lurks in the body. Then something triggers an active case whereby people have heart attack, stroke, or CJD?

I'm thinking of a child having the chickenpox, but then getting shingles decades later. While shingles is obvious from having chickenpox, maybe there will be a test that would conclude the person had the Covid or vaccine that resulted years later in a heart attack, stroke or CJD.