Now, as the World Health Organization expects a second wave of the flu to hit the northern hemisphere in the fall, it is worth considering some of the looming questions on how CAFOs could be contributing to the occurrence of disease.
It's entirely possible that the Smithfield facility at La Gloria had nothing to do with this outbreak. But it's not exactly a "wild theory" -- Smithfield pigs are being tested for the new H1N1 strain as I write this.
A deadly new influenza virus has managed to jump from pigs to people in a previously unseen mutated form that can readily spread among humans. How could this happen? There are several plausible explanations.