different types of viruses seamless patten. scientific hand drawn in sketch style

seamless pattern virus bacteria microorganism covid coronavirus hepatitis influenza corona rotavirus hiv adenovirus graphic background sketch hand drawn drawing doodle set type germ bacterium cholera epidemic unicellular cell molecule biology microbiology gut microbe flu micro organism disease vector microbiota science microscopic bacillus pathogen streptococcus zika measles amoeba wallpaper design web types viruses patten scientific style patten