herpes viruses. hand drawn set of microorganisms. scientific in sketch style

herpes virus bacteria microorganism epsteinabarr varicella zoster simplex simplexvirus cytomegalovirus sketch hand drawn engraving pen pencil etch drawing doodle set type germ bacterium epidemic cell molecule biology microbiology microbe micro organism disease vector science microscopic bacillus pathogen skin isolated black white element pandemic microscope symbol infection scientific bacterial human illness viruses microorganisms style viruses microorganisms style