In Reply to: How would you know if it works? posted by cliff on Tuesday, 23. August 2005 at 18:21 Bali Time:
A well travelled to Java Bahasa Indonesian teacher i met got cholera because of eating from a food cart. The cholera caused eyesight deterioration to what had been very healthy eyes. He now must wear glasses all of the time.
He got away with eating from the carts many many times before this happened.