Then perhaps you should help me to understand. >The flow of virus diversity is from wild to domestic bird populations. Why? If viruses can get in, they can ge

Then perhaps you should help me to understand. >The flow of virus diversity is from wild to domestic bird populations. Why? If viruses can get in, they can get out. The CDC even warns about the possibility [1]. Livestock birds outweigh wild birds by nearly 20 to 1 [2,3]. You're arguing that 95% of the world's bird population is irrelevant to the evolution of avian influenza. It wouldn't take much transmission from livestock back to wild birds to significantly increase the population of potential hosts. >This isn't a breeding ground or the perfect environment for evolution. This is a novel environment that didn't exist 80 years ago. A virus in the wild can't spread effectively if it kills its host too quickly, and it needs to transmit in an environment bathed in UV light with constant air circulation. These aren't limitations in a tightly-packed indoor environment. We wouldn't be culling entire flocks if viral transmission weren't so rampant in these environments, and you can't have viral replication without mutation. >The article is also about wild birds. The article also talks about poultry, which, again, make up 95% of all avian biomass and are therefore relevant to ANY conversation on avian influenza. [1] - https://www.cdc.gov/nceh/ehs/Docs/Understanding_CAFOs_NALBOH.pdf https://www.cdc.gov/nceh/ehs/Docs/Understanding_CAFOs_NALBOH..., page 16 [2] - https://ourworldindata.org/meat-production#meat-production-by-animal https://ourworldindata.org/meat-production#meat-production-b... [3] - https://ourworldindata.org/life-on-earth https://ourworldindata.org/life-on-earth