Could factory farming really cause the next pandemic?
Short answer: Yes. Most new human diseases come from animals, and crowding thousands of genetically similar animals together is how a mild virus becomes a killer.
Around 60% of known human infectious diseases, and up to 75% of new ones, originate in animals. Swine flu (H1N1) and avian flu (H5N1) both trace back to farmed animals.
UNEP / ILRI (2020)
The objection
“Pandemics are bad luck from wet markets or bats, nothing to do with the chicken in my fridge.”
The answer
This is a design flaw, and we built it.
The UN is blunt: around 60% of known human infectious diseases, and up to 75% of emerging ones, come from animals. Factory farming is close to a perfect incubator for the next one. Take tens of thousands of animals, breed them to be genetically near-identical, pack them together stressed and immune-suppressed, and you have given a virus an unbroken chain of hosts to spread, mutate and amplify in. Swine flu (H1N1) emerged from intensive pig farming; bird flu (H5N1), now killing wild mammals and jumping to dairy cattle, is propagated through industrial poultry.
There is a slower pandemic running alongside it. More than 73% of the world’s antibiotics are used on farmed animals rather than people, much of it routine, which makes the sheds a production line for antibiotic-resistant bacteria. Drug-resistant infections were already linked to over a million deaths in a single year.
Here is the bit that should land even with someone who feels nothing for the animals: the risk lands on you. The crowding that makes meat cheap is the same crowding that makes the next outbreak likely. You can care nothing for the pig and still not want what the pig shed is brewing.