bacteria and virus seamless pattern. scientific in sketch style. doodle background

pattern seamless germ bacteria virus vector background design wrapping paper print textile fabric bacterium wallpaper ornament hand drawn sketch engraving ink pen drawing doodle line art outline vintage retro chalk etch texture cholerae streptococcus helicobacter salmonella lactobacillus pneumococcus staphylococcus clostridium botulinum shigella campylobacter meningococcus proteus coronavirus hiv influenza herpes mumps scientific style pattern style background