Questions for “Copper ‘foam’ could be used as filters for COVID-19 masks”
![kids wearing face masks and hugging](https://www.snexplores.org/wp-content/uploads/2021/05/1030_LEM_copper_foam_feat.jpg)
Face masks have become a common method of protection during the COVID-19 pandemic. A new copper “foam” could make those masks work even better.
Pollyana Ventura/E+/Getty Images