Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Wie Vapen die Lungenfunktion beeintrchtigt ndd Medical COPD Schwabe Austria Langzeitstudie: E Zigaretten erhhen Risiko fr Lungenkrankheiten DIE ZEIT