It's more than wet markets, although those are obviously dangerous. It's the continued expansion of human population into rainforests and other wildlife areas:

It's more than wet markets, although those are obviously dangerous. It's the continued expansion of human population into rainforests and other wildlife areas: > Yes. EcoHealth Alliance, an NGO, and others, looked at all reported outbreaks since 1940. They came to a fairly solid conclusion that we’re looking at an elevation of spillover events two to three times more than what we saw 40 years earlier. That continues to increase, driven by the huge increase in the human population and our expansion into wildlife areas. The single biggest predictor of spillover events is land-use change—more land going to agriculture and more specifically to livestock production. This is not going to be fixed easily. Everything from the deforestation of the Brazilian rainforest to Chinese population growth is driving it.