[boop]

Please don't take this the wrong way, but how was it proven that your family member died from SHS? I am a physician interested in this, and I have not heard of a cause of death as "second hand smoke".

[RedBloodedAmerican]

With their cancer they could find where it started, so they knew it started in the lung. And from the type of cancer it was, they knew it was not a result of asbestos and somehow started as a result of tobacco. I did not talk to the oncologist treating them, so I don't know the medical jargon and details.

I am surprised that you, being a physician, would ask that and not know the basics of cancer - ability to know its source and cause.