seamless pattern with single cell microorganisms or microbiomes on transparent grey blue colored background. backdrop with

allergen amebiasis amoeba animal bacillus backdrop background bacter bacteri bacteria bacterium biology brain cause cell creature dangerous disease eating endless epidemic germ harmful illness illustration infection infectious micro microbe microbiology microbiome microbiota microorganism microscopic microscopy organism pandemic pathogen primitive print prion protist protozoa science seamless single subtilis texture unicellular viroid virus