bacteria-banishing cleaner

air amoeba bacillus background bacteria bacterial bacteries bacteriology bacterium biological biology biotechnology blue care caution chemistry clean cleaning concept contagion danger dirty disease ebola epidemic fear flu genetic germ germs grippe health healthy hospital hygienist icon ill illness illustration infection infectious inhalation isolated liquid material medical medicals medicine micro microbe microbiology microorganism microscopic molecular organic organism privies protection research safety salmonella science shell sick signs technology treat vector viral virus white