The examples below, which are large prospective studies, mostly included people who smoked after 1967 when increasing proportions of smokers using filters were likely to be using filtered-ventilated cigarettes
Analytical Chemistry 88(12):65006508
[1] Although nicotine and its addictive nature are the most commonly-known danger of cigarettes, there is also the danger of the radioactive isotopes Po-210 and Pb-210, which become harmful to humans when ingested
and Margaret Odom , Regional Extension Agent , all with Auburn University Revised November 2022, The Cost of Vaping (English) , FCS-2451 Revised November 2022, The Cost of Vaping (Spanish) , FCS-2451-S
This decision was prompted by a wealth of evidence indicating that these devices were leading to a new type of nicotine addiction, even among non-smokers