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Domestication right now than in the last 10,000 years of domestication until 1960 combined. Huge numbers of livestock that were keeping right now, and many of them live in these factory farms. We have a million or more individuals crowded together. So theyre basically, the animal equivalent of urban slums. This similarly allows pathogens to amplify and change to make them more virulent. One example of that Avian Influenza virus, normally live in waterfowl. But when the viruses drop into these factory farms where captive animals are come together, they start to change and replicate and mutate. That is what viruses do. They become more virulent. We have problems with more virulent forms of Avian Influenza. Some involve ways that can infleck humans. They started carrying these pathogens found in more efficient way. That is something cholera took advantage of. That was steam tr ....