Ban on flavored vaping may have led teens to cigarettes, study suggests Yale News San Francisco has outlawed smoking from almost every corner of civic life in ordinance after ordinance, including at bus stops, ball parks and even when waiting in line outside for a movie E Cigarettes Public Health Law Center San Francisco Set to Ban E Cigarettes WSJ Philip Morris' new vaping product may replace cigarettes. Here's why FOX 10 Phoenix Severe health risks of vaping and e cigarettes, especially for youth, say experts