Mostly farmers get it, has not much to do with hygiene. More with contact with contaminated birds like with getting Covid and flu from other humans.Did it say what living conditions those people were living in? A dirt hut? with the chickens walk in and out of their dirt hut home?
Again, Las Vegas will not take odds on this happing in a developed country with good hygiene.
Predators and rats get it from eating raw contaminated meat.