To play safe...
A Madrasi went to a sardarji's village in Punjab and asked to his host, "what do you do to prevent infection from drinking water? Sardarji replied, "first we boil it."
"That's very good", said mardrasi guest. "Then we filter it".
"Wonderful!, exclaimed madrasi. "And to play safe, we drink only beer", said the beaming sardarji.
