ニューヨーク・タイムズのインスタグラム(nytimes) - 8月11日 05時15分

Many New Yorkers are avoiding the subway, fearful of jostling with strangers in crowded cars. Masks and social distancing are essential, but good air flow is also key to reducing the risk of exposure to the coronavirus.

The subway’s ventilation system moves air within train cars more efficiently than restaurants, schools and other indoor settings, according to aerosol experts. The filters work to block large and small aerosols before air enters the ducts. But the filters do not catch everything — and some viral particles could slip past and get dispersed into trains.

The Metropolitan Transportation Authority, which runs the city’s subway, is testing out new ultraviolet technology that could be installed inside trains to kill viral matter in the air. This would prevent any viral particles a sick rider exhales from being recirculated through the ventilation system.

Still, the simulations underscore the importance of both good ventilation and passengers wearing masks: Without proper ventilation, those aerosols would stay aloft in the air and build with each sneeze or cough. Tap the link in our bio to read more.

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