Can my wife get Montezuma revenge going back to Mexico or visiting the Mexico?

That's a show she's doing to you, I been in Mexico many times and me and either my wife got sick, yes the air is polluted, but, What about New York City or Berlin? Both are in the same conditions, too many cars and a lot smog. It's just in her head. Perhaps the 3rd world is the Earth, in the way you are writing your comments I can see a lack of racism.