New York Times (Dec. 23) – Big is not always worse, however, according to William E. Sander, a veterinarian and public health specialist at the College of Veterinary Medicine at the University of Illinois at Urbana-Champaign. For example, large industrial farms in the United States pay a lot of attention to biosecurity and disease surveillance because of the danger of a disease sweeping through a large and genetically similar group of animals, broiler chickens, he said.
https://www.nytimes.com/2020/12/23/science/covid-mink-animals.html
https://www.nytimes.com/2020/12/23/science/covid-mink-animals.html