hands holding three different masks with negative space on the left for text

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