The research was supported by the National Institutes of Health, grants R21 ES027943, T32 AG055378 and S10RR0287878, and the National Science Foundation, grant GVPRS0015A.
The researchers focused on data from children as, unlike adults, children were unlikely to have vaped or smoked themselves, meaning higher nicotine absorption was a result of second-hand vapour or smoke only
However, the tar that caused the damage in the first place can take even longer to leave your lungs
Male smokers typically average about 12 cigarettes daily, while for women it is approximately 11 cigarettes a day
However, a closer look at the trends over the past two decades tells a somewhat more complex story of both modest progress and some backsliding