Virus : A secret evolutionary force?

Anonymous
I just saw a insta post where it said that human dna has been so exposed to viruses of many types over many years that human DNA has eventually changed irreversibly.
This made me think. Im not trusting the source 100%, but It does make sense that immunity passed on does have a DNA based impact. So, it does mean that its possible that human DNA has been changed like so.
If so, then viruses might have played a very important role in all living organisms in their evolutionary status.
What do you think?
Virus : A secret evolutionary force?
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