The thesis may seem somewhat controversial considering most of what we hear about viruses, at least in the public forum, is negative. There's good reason for that. After all, in the last year alone, the United States has had to deal with cold viruses, flu, West Nile virus, Chikungunya, Heartland virus, and of course, Ebola. But while these viruses get all the headlines, many good examples tend to get no attention at all. This has caused a skewed view of these microbial creatures and quite possibly has prevented us from seeing the good they can do for our health.