•    The oxidative potential of PM2.5 was highest outdoors.
•    Sources contributing to PM2.5 oxidative potential were regional aerosol, roadway emissions, and residual oil combustion.
•    An air cleaner can reduce the redox activity of indoor and personal exposure to PM2.5.


The health effects associated with human exposure to airborne fine particulate matter (PM2.5) have been linked to the ability of PM2.5 to facilitate the production of excess cellular reactive oxygen species (oxidative potential).


Credit: Debora Cartagena CDC

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