I was looking forward to this book, but it ended up being an utter disappointment. The virus storyline that should've been the main plot was reglated to subplot status, which made me question the point of even doing this book as a "Double Helix" book. Heck, the virus isn't even mentioned until page 122! And when it was mentioned, it was done in a very offhandish way.
It seemed to me that the author was more interested in telling her story about the commander (Eric Stiles) than she was about the supposed purpose of the book, and that just seemed utterly disrespectful to me. That story should've been saved for another novel, and the main focus should've been on the research to discover a cure.
I found the ending to be way too pat for my tastes. I've never been a fan of "surprise endings" in which we are dumped a pile of information that we didn't previously know and the author goes "ha! gotcha!" as if that's supposed to make us feel like dupes for not figuring out the mystery (even though there's no way to figure out the solution given just the clues in the book). This happened with the "surprise" revelation that Zevon had a child, and this child is the last "uncontaimed" Romulan royal family member.
There were also some plain-out weird word choices in this novel. I can't remember any other book where I've paused so much after reading a certain word or phrase. Using the word "edited" in a dialogue tag, and Dr. Beverly Crusher remarking that perhaps she would change her career to being a professional wrestler (when I'm fairly sure no such thing exists in the ST future) were just two of the many examples that caught my eyes.
All in all, a very disappointing story, one that I wouldn't recommend at all. Perhaps the worst Star Trek story I've ever read.