Hunting Fossil Viruses in Human DNA

I found this article on Fossil viruses involving Human DNA. The article is called "Hunting Fossil Viruses in Human DNA." The author of this summary is Carl Zimmer and it was published on January 11, 2010. It is credited in the New York Times and the link to the website www.nytimes.com/2010/01/12/science/12paleo.html.
The article explains the significance of the borna virus which likely infected the monkey-like ancestors of humans upwards of 40 million years ago. It explains that the virus has been transmitted down in human genetics since we first contracted it, and it has been passed down in our genes ever since. Even though humans have continued to evolve overtime, the fossil virus are effectively frozen in time. "We can really dig fossils out of the genome and literally put them back together," said Cedric Feschotte, a genome biologist at the University of Texas. The article continues on to explain how they believe around 100,000 genomes in the human DNA scale has been caused by an infectous virus that humans have become adapted to. It goes on and explains how humans adapted to these killer viruses as a survival techinque.
I found the article to be very interesting, considering it related to how humans adapted to viruses as a survival technique. As a relation to something we learned in class, the polio virus found a host cell to transmit onto human RNA, which is the same thing the Borna virus did to humans as well. The article did a good job breaking down how the human DNA scale worked, and explained how the Borna Virus would become altered into Human DNA. The only thing I did not like was that the author did not make it clear whether or not the Borna virus is still found in humans today. It left me with some unanswered questions. Do humans have altered DNA as a result of the Borna Virus? If the article answered this question and some of my other ones, I would have found it to be a much better article.