Egypt reported its first cases of avian influenza in humans in December 2006. In the first 3 months of 2007, there were 14 more human cases of avian flu, with three deaths in that quarter year. Like people in much of the world, most Egyptian households keep small numbers of chickens. However, a tradition unique to Egypt is that their poultry are fed mouth to mouth by women who first chew grain and then blow the powdered feed into the mouths of their birds.

What does this information further suggest about the ways avian influenza H5N1 spreads to humans? What additional information would you want in order to confirm your idea?