Can DNA be repaired?

Question

And if so, how does this work?

Answer 1

Yes. The body does it naturally to a certain extent with an enzyme called DNA Polymerase.  Here's a Website giving a short summary of the 3 types of DNA repair.

Answer 2

There is a DNA repair enzyme.

Even during replication by DNA polymerase I there is some repair.

Answer 3

yes... BY gene therapy