Although in-flight infections thrive in dry environments like airplanes, your risk of getting sick from an airplane is actually low because of the air filters used.

尽管在飞机等干燥环境中，飞行的过程中很容易滋生传染病，但由于飞机上使用了空气过滤器，因此你在飞机上得病的风险实际上很低。

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Clean the air filters of offices regularly.

定期清洁办公室的冷气尘格。

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Offer to help your parents keep the air filters on your ac and furnace clean.

帮助父母保持空调和暖气的空气过滤器的清洁。

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HEPA filters capture almost all particles in the air that are zero point three microns in size or larger.

VOA: special.2009.07.14

The Centers for Disease Control says HEPA filters are effective in clearing the air of many particles that cause disease.

VOA: special.2009.07.14

The first HEPA filters removed radioactive particles from the air.

VOA: special.2009.07.14

The panel produces clean water from the humidity in the air, through filters.

BBC: Advert turns air into drinking water

Plastic mattress covers help keep dander out of beds, and room air cleaners equipped with high efficiency particulate air (HEPA) filters can remove dander from the air.

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Do you want to spend the rest of your life stacking air filters and selling alternators?

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