I think it's a close enough analog. If there is sufficient ventilation, you might not smell it in one area but very strongly in another. If you place an infecti

I think it's a close enough analog. If there is sufficient ventilation, you might not smell it in one area but very strongly in another. If you place an infectious person in place of the smoker, you can guess where the danger zone is (not in the area free of smell). You're right, of course, that cigarette smoke carries further and many more people will be able to smell it than there are people at risk of infection in the same situation.