Yes, and especially the lung related sensitivities due to years of exposure to their horrific ambient air polution containing a zillion carcinogens, bacteria, mold and the impure local water if they drink it. I spent a lot of time working with Asians years ago, it wasn't unusual for someone in the group to be sick at home recovering from food poisoning or other intestinal issues related to cleanliness or proper food handling. The risks of buying lunch at the Hocker Stand near the factoriy. I had a terrible return flight on one trip, intestinal flu or something during a 28hr direct flight, oh what agony! I'll never ever eat Century Eggs or BBQ Chicken Feet on the eve before a return flight again! Thought I was going to die. I'd hate to face that a few times every year. It must weaken the digestive system over time.