> It’s surprisingly difficult to track the this stuff in part because many diseases make the jump but then simply die out without gaining a major foothold in th

> It’s surprisingly difficult to track the this stuff in part because many diseases make the jump but then simply die out without gaining a major foothold in the human population. I was wondering about this the other day. How can we know if some other zoonotic coronavirus spread to a only single rural household somewhere? Is there any way to estimate this? Is there any literature on the subject?