Altered DNA ...?

Some claim the vaccine alters your DNA, I want to know how it does this? I thought you got half from your mother and half from your father when the sperm met the egg. I also thought it was pretty much set in stone when you were born. Now that I have been jabbed I want to know what to expect. Will my skin get darker? Will my hair start to curl? maybe I can have blue eyes? What are they afraid of???