“One of the most fascinating things to come out of this study so far was actually a bit of a lucky break (for science, not for Mike). Over the course of the experiment, Mike developed type 2 diabetes. And not only did we get to pretty much watch this happen in real time, but we also got to see that it might have been caused in a totally unexpected way—a respiratory syncytial virus (RSV) infection. To my knowledge, this is the first time the progression to type 2 diabetes has been seen to be caused by a virus and also seen in such detail.”
https://www.kqed.org/science/6821/virus-induced-type-2-diabetes