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Yes, the smell of weed can go through walls even without vents, especially if the walls are thin or have cracks

A 2010 analysis found smoking increased Alzheimer's risk once studies funded by the tobacco industry (which had tended to report a protective effect) were excluded, [39] while a later pooled analysis of longitudinal cohorts across several countries found no significant association between smoking and dementia, including Alzheimer's disease specifically

This means it is not allowed in checked or carry on luggage