[Natural Law]

China still has deplorable health and sanitation practices. For the most part, they exist on poor diets and are exposed to environmental toxins and pollution not imaginable by those of us in western countries. Markets are full of live exotic animals and home grown poultry and produce. The use of "night fertilizer" is still very common outside the major cities. Add in a little over crowding, lack of basic medical care, unaffordable medicines and superstition and you have a recipe for disaster.

[saveliberty]

That is a very good explanation. Thank you. :-)