ScienceGood, bad or counterfeit?To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGabriel Borrud and Conor Dillon06/19/2020June 19, 2020Roughly one third of face masks fail German quality control tests. Here's how to tell if yours is safe. Listen to DW's science podcast for a different angle on the coronavirus — five minutes every day from Germany.https://p.dw.com/p/3e34OAdvertisement