chief risk factor is smoking cigarettes Health Risks of Tobacco Tobacco control | UICC

All carry-on bags within Deltas size restrictions will be gate checked, free of charge, during the boarding process and returned upon deplaning

The study, published in the journal Lancet Regional Health and carried out in collaboration with Action on Smoking and Health (ASH) and Brighton and Sussex Medical School researchers, looked at survey responses from 2,770 young people in Great Britain (aged 11-18) and 3,947 adults (18+) in the UK who were shown either branded vape pod packs or standardised packs

It does not say how units should be covered, but most retailers using sliding doors or hanging covers

A worn-out cigarette box