Chambana Sun

[M]assive commercial farms raising hogs by the thousands may not be the biggest threat. On large farms in the United States and many other countries, biocontainment measures limit contact between people and pigs, says James Lowe, a swine vet at the University of Illinois, Urbana-Champaign, who studies influenza in commercial pig herds. Instead he worries about shows like the week-long exhibition in Des Moines… “The show pig population is the one that’s got all this interaction with people.” But it’s a risk, he says, that “everybody kind of ignored.”

https://www.science.org/content/article/thwart-next-pandemic-swientists-hunt-flu-viruses-u-s-hog-shows

Original source can be found here