They were looking for four specific, visible signs of aging: earlobe creases, arcus corneae, (a grayish ring around the corneas in your eye), xanthelasmata (yellowish plaques on your eyelids), and male pattern baldness
Over time, frequent smoking may contribute to respiratory issues, even though cannabis smoke is generally considered less harmful than tobacco
This relates back to e-cigarette vapour because exhaled vapour is visible, allowing people to see the aerosol that has just come from your lungs - as COVID is a respiratory illness, that e-cigarette aerosol could contain the COVID virus, if exhaled by someone with COVID
Describe the history, administration, mechanisms of action, and effects of caffeine