PMI and other manufacturers data showed an equivalent reduction in toxicity when smokers (or animal models) were switched to IQOS compared to cessation, while some independent research showed harmful effects
Carcinogenesis 21 , 839843 (2000)

How Smoking Burns Your Health Reviewed by: Review Date: January 15, 2014 Citation: Centers for Disease Control and Prevention, Health Effects of Cigarette Smoking Centers for Disease Control and Prevention, Arthritis - Risk Factors MedlinePlus, Cancer - throat or larynx American Heart Association, "Smoking: Do you really know the risks?" Reuters, "Smokers don't make better lovers" JCI, "Cigarette smoke selectively enhances viral PAMP and virus-induced pulmonary innate immune and remodeling responses in..." Courtesy of Ruzanna Arutyunyan | Dreamstime Courtesy of Tomislav Birtic | Dreamstime Courtesy of Stephen Coburn | Dreamstime Courtesy of Radu Razvan Gheorghe | Dreamstime Courtesy of Jabiru | Dreamstime Courtesy of Kati1313 | Dreamstime Courtesy of Lucidwaters | Dreamstime Courtesy of Mystock88photo | Dreamstime Courtesy of Edyta Pawlowska | Dreamstime Courtesy of Sergey Peterman | Dreamstime Courtesy of Paul Prescott | Dreamstime Courtesy of Raja Rc | Dreamstime Courtesy of Dmytro Tolokonov | Dreamstime Courtesy of Pongphan Ruengchai | Dreamstime Courtesy of Lisa F

Take a support person with you
Most of the nicotine in a cigarette is destroyed by combustion or remains in the sidestream smoke that you do not inhale
He ended up in the hospital, where he made a few good-natured complaints about being restricted to just one cigarette per day