We're not sure how they got infected yet, but it's not just chicken consumers that have gotten this. Contact with feces, very close contact with infected birds (without eating them, I mean), contact with an object that touched an infected bird, and rare cases of human-to-human (and cat-to-cat) transmission have taken place.
Do you think it's a matter of time before we see a full blown breakout into human to human transmission with a high mort rate?