Can secondhand weed smoke make you fail a drug test?

Via ScienceDaily · Science

Myth, unless the room is doing something very strange. Johns Hopkins researchers put non-smokers in a sealed chamber alongside heavy cannabis smoke for an hour with the ventilation fans switched off. Those people felt mildly high and turned up positive on urine tests. Then the team ran the same hour with the fans on. Same smoke, same room, and the ventilated group did not feel high and did not test positive. Lead author Evan Herrmann described the sealed version as a very extreme situation, which is researcher for do not try to recreate this. A normal room, a car with the window cracked, a backyard: none of that is coming for your job.