When one study says there's no risk from second hand smoke, the anti-smokers just go out and get another study.

Passive Smoking Heart Risk Double Earlier Estimates - Passive smoking may be much more dangerous than scientists had thought, researchers said on Wednesday in new study that is likely to boost demand for a ban on smoking in public places.

When researchers come out and proudly proclaim that their study should help advance a specific agenda, you can color me skeptical. The virulently anti-smoking World Health Organization found that there was no statistical link, nor any proof that second hand smoke has negative health effects.