This article states that there our DNA has adopted viruses that are helpful. Do anti-viral medicines mess with them?
The bit about adopting DNA that is helpful is just nonsense — the virus didn’t ask permission, it hacked its way in, then stayed put. Each gene “word” consists of three consecutive base pairs, such that former working sequences or future potentially working sequences are basically inert series of base pairs with a one or two-basepair intro rendering them useless.
“This article states that there our DNA has adopted viruses that are helpful. Do anti-viral medicines mess with them?”
No. They aren’t active as viruses any more.
It is DNA integration in to the genome that affected chromosomal regulation or creation of novel genes which are now integrated in to the genome.