medical mask with a valve. n95, ffp1, ffp2, ffp3 protective mask.

air airborne art background blue breath clip construction contamination coronavirus covid19 danger disease dust epidemic equipment face ffp1 ffp2 ffp3 filter filtration flat germs health hospital illustration industrial infection infectious lungs mask medical medicine n95 outbreak pandemic particle pollution precaution prevent protection protective quarantine respirator safety smog style supplies valve vector vent virus work