Now, the Chinese have had for centuries a not-bad innovation called the pig toilet. People poop and the pigs... well let’s say they are not picky eaters! Poop in, ham out... such a deal, as long as the problem of parasites is overlooked.
Yes, parasites, including most strains of flu virus. Most flu strains are incubated in Southern China, where people live close to pigs. Kind of like the WH being an incubation hot-spot for new virulent forms of socialism.