An air cleaner can help remove indoor pollutants and reduce the spread of pathogens such as the coronavirus. The Post’s Lena Sun demonstrates how to make one. (Video: Joy Sung, Lena Sun, Jayne ...
SAN DIEGO — Thinking outside the box, students took COVID safety into their own hands. "It’s a box fan, and then you make a cube out of these filters that you can buy at any hardware store, super ...
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