Scientists warn against breathing in secondhand vape ‘smoke’

tomwt — Tue, 03 Feb 2026 16:42:35 +0000

Scientists warn against breathing in secondhand vape ‘smoke’ tomwt Tue, 02/03/2026 - 08:42 More CNAS in the Media Ian Randall | Newsweek February 03, 2026

NEWSWEEK - Breathing in lingering, secondhand e-cigarette vapors has the potential to damage lung tissues.

This is the warning of a new study by researchers from the University of California Riverside, who found that aged vape aerosols contain fine particles bearing metals and highly reactive compounds that can combine to produce harmful radical particles.

"Our study reveals that the chemical cocktail of metal nanoparticles and reactive peroxides in aged e-cigarette aerosols creates a unique profile of respiratory health risks," said paper author and environmental scientist Ying-Hsuan Lin in a statement.

The finding, Lin added, highlights "that secondhand vapor is something bystanders shouldn’t have to breathe."

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Secondhand vape plumes could form lung-damaging radicals

tomwt — Mon, 02 Feb 2026 19:35:39 +0000

Secondhand vape plumes could form lung-damaging radicals tomwt Mon, 02/02/2026 - 11:35 More CNAS in the Media ACS Newsroom | American Chemical Society January 30, 2026

AMERICAN CHEMICAL SOCIETY - Electronic cigarettes — or vapes — can release puffs of vapor in aromatic clouds. The health risks of breathing in this secondhand or passive vapor aren’t fully understood. So, researchers reporting in ACS’ Environmental Science & Technology conducted a preliminary study on lingering vape plumes in indoor environments. They found that aged vapor contained fine particles with several metals and highly reactive compounds, which together produce radicals that might damage lung tissue if inhaled.

“Our study reveals that the chemical cocktail of metal nanoparticles and reactive peroxides in aged e-cigarette aerosols creates a unique profile of respiratory health risks, highlighting that secondhand vapor is something by-standers shouldn't have to breathe,” says Ying-Hsuan Lin, the corresponding author of the study from the University of California, Riverside.

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