Airborne, probably originating in the house where the woman was caring for the 78 year old. Enough in the lungs to spread into the air in the cop car. Police were exposed when they went to the house. Clothing of the woman who went into the ER would have carried what is the producer of the molecule. Police uniforms also need decontamination.
That makes sense.
Never heard of this happening before.
Everyone’s into essential oil diffusers these days, drives my sister nuts because they are using them in the hospital there. Maybe someone was experimenting with weird essential oils