China IS somewhat more likely to have viruses hop over for a couple reasons:

1) It's a large country that extends from colder, northern, climates to southern sub-tropical climates. This means that they have a wide variety of animals.
2) They have a very diverse diet. The US and EU, in comparison, eat pretty homogenous food, especially meat. That means that we are exposed to a reduced range of diseases. This is not necessarily a good thing, but it does appear to be the case.