Wilks made the comment in a recent interview with Men's Health, whilst discussing the health and environmental benefits of a plant-based diet.
"With this lockdown, with COVID-19, we know that the root of this is from animals," the filmmaker said.
"If you look at the swine flu, the bird flu, all these pandemics, three out of four, started because of animals, whether that's wild animals or farm animals."
Wilks continued: "The funny thing is people say we don't want to spread disease so we should separate and have this social distancing, well what are we doing to animals that are in factory farms?
"What conditions are they in? It's no wonder that disease is spreading among those animals and then it transfers over to humans."
Wilks added that risks to 'public health' were another reason people should be eating 'more plants'.
You can watch the full interview here