Michael Osterholm says it possible clouds of dust are getting kicked up that have bird feces in them, and it’s possible it’s spreading that way. I sort of don’t think there’s human transmission yet. Maybe a very low level but from what I’ve seen key mutations generally considered necessary for human transmission haven’t been found in any strains yet (although I did see a journal article today saying they found slight binding to human receptors so…). In any case only 3 cases have been unknown exposure so far.