webset of hand drawn different types of viruses. in sketch style. realistic scientific drawing

virus coronavirus covid corona influenza herpes zika cytomegalovirus hiv mumps hepatitis sketch type science bacteria pen cell microscope vector symbol winter black pandemic weather infection icon disease ink pencil clipart anatomy rotavirus danger biology organism molecule scientific bacterial human illness vintage immune engraved doodle drawn organic pathogen webset hand types viruses style realistic drawing set viruses style drawing