But while the bacteria have been getting most of the attention, 2015 has also been a respectable year for viruses. Granted, not all the news has been good. Viruses are, after all, parasitic organisms requiring a host to survive and thrive. When that host happens to be human, the result can be illness, morbidity, and possible death. But as a result of some very intriguing studies, the role of viruses in our lives is much more valuable to us than simply cell invaders and killers.