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Loose lithium batteries are prohibited in checked bags

All three participants were informed of the experimental requirements and signed an informed consent form

Vaping : Vaping involves inhaling vapor produced by an electronic cigarette (e-cigarette) or other vaping devices

The United States Environmental Protection Agency, or EPA for short, has this to say about the efficacy of HEPA Filters: This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (m) Particles that are larger or smaller are trapped with even higher efficiency