In June 2002, the Coalition Citoyenne Santé & Environnement was founded by citizens who were objecting to pig CAFOs in the province of Quebec. There were many reasons to not want industrialised pig farms, the same as in Europe and the United States: one that was mentioned many times is that these concentrated animal farms would be breeding pools for superbugs. 

The fact that pigs are the stepping stone between the many avian viruses and man, and that antibiotics are regularly used in micro-dosing to promote fast growth in CAFOs made the threath of epidemics very real. Well, here we are, 7 years later. Swine flu has struck. 

"New U.S. swine flu cases spread pandemic fears"

Here is the link:

http://today.msnbc.msn.com/id/30398682/