Nothing in that article indicates the victims of heart attacks, their smoking habits before and after the ban, their levels of exposure to 'second hand smoke,' and any changes in cholestrol intake, changes in industrialization locally, or other related factors. This may imply that the ban has had a positive effect on heart disease, but it does not definitely prove anything. And, of course, if the statistics for the next year imply the opposite or neutrality, the same source which had this publicity put out will be reticent.