In situations like this it is very hard for people to be deliberate. I do not think that is Peter's style. I also would bet he fully knows about the grape vine going on about this and I suspect he will eventually announce his situation.
As for the etiology of this virus I fully agree with Lewm who is more knowledgeable about this than I am. In nature this virus is likely to mutate one protein at a time and what ever it does is up for grabs. It may well mutate itself out of existence just as well as becoming more virulent. One thing is for certain, once a virus loses it's hosts it is done. It can not replicate without the genetic machinery of it's host. There is always a way to eradicate a virus, you either immunize or knock off the hosts. Smallpox is an example.