Where Germs Lurk on Planes – WSJ.com

Avoid staying inside a plane without air circulating. This adds another reason why missed or delayed flights damage

Air that is recirculated throughout the cabin is most often blamed. But studies have shown that high-efficiency particulate air (HEPA) filters on most jets today can capture 99.97% of bacterial and virus-carrying particles. That said, when air circulation is shut down, which sometimes happens during long waits on the ground or for short periods when passengers are boarding or exiting, infections can spread like wildfire.

via Where Germs Lurk on Planes – WSJ.com.

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