Modeling and simulation of moisture penetration and wearing time of face masks

The last two years have shown an increasing awareness of the use of face masks and respirators in order to protect the wearer or the surrounding people against infections.
Two protection concepts can be distinguished: self-protection and external protection. In the first concept, the wearer wants to protect himself or herself against infectious pathogens or viruses in the surrounding. Depending on the availability, corresponding filter masks should be preferably used by people working in health and nursing care. In the second concept, the wearer protects people in the surrounding from being infected.