bacteria on skin silhouette icon. microorganisms on structure of dermis black icon. skin layer with microbes flora and

skin bacteria microbes flora icon vector epidermis cell layer virus moisture barrier dermis human microbiome dermatology structure illustration face anatomy damage care healthy protection pore acne microorganisms microbiology research microbiota staphylococcus infection normal inflammation magnifying skincare intestinal health salmonella sebum pictogram isolated flat silhouette black