One common concern about cloth face masks is the level of filtration they provide. The fabric’s mesh is often too open to filter out smaller particles such as smoke, dust, or viruses. A popular ...

Melitta, the German maker of the original paper coffee filter, retooled its production to make masks. A director called the filter’s perfect fit over the face “a gift from heaven.” Credit...Daniel ...

[BERLIN] As the wave of coronavirus infections broke over Europe in March, causing reserves of medical supplies to disappear, German authorities made a nationwide appeal: More safety masks were ...

Cloth face coverings may help curb COVID-19 transmission because presymptomatic and asymptomatic people can transmit SARS-CoV-2. Wearing a mask helps contain respiratory droplets from talking, ...