The mRNA vaccine alters the cells in your body by causing them to grow spike proteins like those found on the COVID virus.

1: How long do the spike proteins remain a part of your cells?

2: What are the long term effects of having the cells in your body altered by the addition of a un-natural spike protein?

I can't find an answer to question number 1.

Obviously, I can't find the answer to question number 2 because no one knows.