I tell this joke whenever I can:
This thread reminds me of an old joke. Taiwan expat in South Africa has a cold he just can`t get rid of. He goes to the Saffie doctor. Doctor gives him the normal remedy. Does not work. Comes back a few days later. Doctor tells him to defecate in a tupperware container, add paint solvent, chemical sprays, and a whole bunch of other nasty chemicals, etc. Then the doctor tell him to close the container, wait an hour, and breathe in the fumes.
Expat comes back a week later and is full of praise. I was immediately cured, he tells the doctor.
You were not sick from a bug or virus, the doctors says. You were homesick.
Air pollution levels in Taiwan - grim reading - Taiwan / Living in Taiwan - Forumosa