bacteria and virus icons set. bacteria under microscope. microbe virus sign on white place.

abstract airbone allergens anti background bacteria bacteriophage bacterium bad biology black cell concept contaminants coughing design diagram disease dishes dust duster ebola elements health hiv human icon icons illness illustration infection isolated medical medicine micro microbe microbiology microscopic mirco mold oraganism organism outbreaks people petri pictogram pollen presentation science set sign superbug symbol template tubes vector virus worms