black and white background with dangerous viruses, germs and bacteria with text.

bacillus background bacteria bacterium banner biology black borrelia brucella candida cell chemical cholerae dangerous design dirty disease epidemic escherichia flu germ germs giardia health hepatitis human illness illustration infection laboratory leishmania medical medicine meningococci micro microbe microbiology microorganism microscope microscopic organism papillomavirus pathogen pneumococci research rhinovirus salmonella science shigella stroke template text tuberculosis vector vibrio virus viruses web white yersinia