I'm not surprised at all. Bird flu has gone form a major to a massive problem in the last year. We just had to wait for it to mutate and infect mamals regularly (it already happened every now and then).
A few days ago there was also news about cats in Poland being infected. It already infects humans sometimes. No human to human infections yet, but I guess with a strain that's mamal compatible, it will come sooner or later (probably sooner).
This is what happens when you put a shit ton of animals in cages together. It will not become better until we find our place in the ecology again, instead of believing we live outside it. This doesn't just apply to infectious diseases.