It is not my opinion here but more a question regarding the steady advance of deadly viruses in the world like Sars and the more severe Mers.
The pig virus in china is another. The Tassie devil virus and probably many others mysteriously effecting native animals in other countries maybe all connected to a change that assists there ability to thrive and mutate. Could it be that a carbon charged atmosphere makes a better environment for bacteria than humans. a very volatile atmosphere.
This volatility may broaden parameters enough to allow these mutations to occur. Amirite?