keep smelling cigarette smoke covid Yes, COVID-19 can be transmitted through secondhand Long Covid and Smell Disorders:

[21] Deaths and health related risk factors caused by smoking in Australia [edit] Smoking is the direct cause of the greatest number of preventable deaths in Australia, [28] with a death toll of 15,500 every year

I did not look closely into why this is the case, but concerns about side effects, lack of knowledge, and generally low rates of quit attempts could explain low takeup rates

But what exactly are they, and how do they compare to traditional cigarettes

[44] On July 10, 2002, the sons of guest Nancy Campbell-Panitz who was murdered by her ex-husband after they appeared on a May 2000 episode with his girlfriend filed suit in Sarasota County, Florida against Springer, his producers, and his distributor, claiming he created "a mood that led to murder"