Understanding the dangers of second hand smoke with Dr. Vaibhav Amale Secondhand smoke, also known as passive or involuntary smoking, poses significant health risks to individuals who are exposed to it, even if they do not actively smoke themselves. Where the dangers of secondhand smoke extend far beyond just a nuisance; they encompass a wide range of adverse health effects, particularly on respiratory and cardiovascular systems. IHW Council AstraZeneca | IHW.tv