three types of respirators. n95, ffp3 yellow, ffp1 gray on background

2019ncov and antipollution background buying care chinese clip coronavirus cough cov cover covid19 crisis daily disease dust everyday face ffp1 ffp3 filter friendly gray grey hand hazard health hour industrial mask material metallic n95 need new nonvalved normal nose objects occupation outbreak pandemic pathogen piece pm25 pollution respirator reuse safety sars skin sneeze texture the three types use valved virus wall yellow