bacteria and viruses line doodle simple icon set

veillonella doodle icon bacillus elicobacter pylori tetracoccus streptobacillus helicobacter coronavirus salmonella bacteriophage vibrio clostridium bifidobacterium escherichia coli influenza rabies petri dish streptococcus hepatovirus cell ebolavirus paramecium caudatum division microscope view herpes simplex microorganism disease vector line style drawing element design pictogram sign illustration symbol sketch handdraw art outline set collection