Few Points from a nurse of 8 years:

In my 8 year tenure as a nurse, we have never had one patient treated, died etc. from second-hand smoke.

People ARE NOT allergic to smoke. An allergic reaction is what happens when you touch poison oak. Sneezing is not an allergic reaction. Our eyes water and sting when we slice onions. It would be preposterous to suggest we were allergic to onions.

Those who claim "right to fresh air" are hypocrites. The vehicle you drive pumps out more carbon monoxide in 10 minutes than hundreds of people smoking in a bar. Try standing in your garage for 10 mintes with your car running....You'll be dead in 8. Nobody has died while dancing because of smoking.

After working as a nurse for 22 years, I can say that the majority of deaths are from 1) Alcohol 2) Cigs 3) Obesity. You may not see the above 3 on the death certificate, but they are the cause.

So no, most deaths are not DIRECTLY caused by the above, but you have to look at the whole picture.