By Stephen Beech A modified face mask can detect kidney disease, just through breath. Surgical face covers became commonplace ...

The breath is cooled by a passive cooling system that integrates hydrogel evaporative cooling with radiative cooling to effectively chill the breath on face masks ... patients with asthma or COPD.

Surgical face masks help prevent the spread of airborne pathogens and therefore were ubiquitous during the COVID-19 pandemic.