Apr 16, 2026 Yul So www.whattoexpect.com Particles released from e-cigarettes may remain in indoor environments long after use and contribute to ongoing health risks, according to a recent review study. Researchers report that e-cigarette aerosols can attach to surfaces such as walls and furniture, creating what is known as third-hand exposure. These aerosols contain ultrafine particles, including nicotine, heavy metals, and other toxic substances. Because of their small size