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    Magnified digital illustration of monocyte cell. — Stock Photo
    Magnified digital illustration of monocyte cell.
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Toilet microbes on contaminated seat surface in water closet, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface in water closet, conceptual digital illustration.
    Toilet microbes on contaminated seat surface, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface, conceptual digital illustration.
    Dust mite consuming skin flake — Stock Photo
    Dust mite consuming skin flake
    Flush toilet microbes on contaminated surface, conceptual digital illustration on white background. — Stock Photo
    Flush toilet microbes on contaminated surface, conceptual digital illustration on white background.
    Giardia lamblia protozoan parasites, digital illustration — Stock Photo
    Giardia lamblia protozoan parasites, digital illustration
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei. — Stock Photo
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei.
    Magnified digital illustration of 2 cell stage embryo. — Stock Photo
    Magnified digital illustration of 2 cell stage embryo.
    Magnified digital illustration of megakaryocyte cell. — Stock Photo
    Magnified digital illustration of megakaryocyte cell.
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration. These Gram-positive spherical bacteria are usually found in pairs. They colonize respiratory tract asymptomatically in healthy carriers, but can cause pneumonia — Stock Photo
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration. These Gram-positive spherical bacteria are usually found in pairs. They colonize respiratory tract asymptomatically in healthy carriers, but can cause pneumonia
    Colonies of Penicillium fungi grown on Sabouraud Dextrose Agar and digital illustration of fungal morphology. — Stock Photo
    Colonies of Penicillium fungi grown on Sabouraud Dextrose Agar and digital illustration of fungal morphology.
    Coloured scanning electron micrograph of breast cancer cells. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cells.
    Cholera bacteria colony — Stock Photo
    Cholera bacteria colony
    House dust mites — Stock Photo
    House dust mites
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae — Stock Photo
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria. — Stock Photo
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria.
    Scanning electron micrograph of head of pork tapeworm intestinal parasite. — Stock Photo
    Scanning electron micrograph of head of pork tapeworm intestinal parasite.
    Spore-forming Microsporidia parasite, computer illustration. — Stock Photo
    Spore-forming Microsporidia parasite, computer illustration.
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together — Stock Photo
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together
    Streptococcus pneumoniae bacteria, digital illustration. — Stock Photo
    Streptococcus pneumoniae bacteria, digital illustration.
    3d rendered illustration of purple nerve cell. — Stock Photo
    3d rendered illustration of purple nerve cell.
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae — Stock Photo
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae
    Mature intestinal tapeworm — Stock Photo
    Mature intestinal tapeworm
    Illustration of red human blood cells on black background. — Stock Photo
    Illustration of red human blood cells on black background.
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Cholera bacteria colony — Stock Photo
    Cholera bacteria colony
    Adult scabies mite — Stock Photo
    Adult scabies mite
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Climbing lily pollen — Stock Photo
    Climbing lily pollen
    Magnified digital illustration of eosinophil cell. — Stock Photo
    Magnified digital illustration of eosinophil cell.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar. — Stock Photo
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar.
    Colored illustration of amyloid plaques on nerve cell. — Stock Photo
    Colored illustration of amyloid plaques on nerve cell.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Coloured scanning electron micrograph of bacteria on surface of human tongue. — Stock Photo
    Coloured scanning electron micrograph of bacteria on surface of human tongue.
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Illustration of human blood cells on black background. — Stock Photo
    Illustration of human blood cells on black background.
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue. — Stock Photo
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue.
    Gram-negative Veillonella bacteria, digital illustration. — Stock Photo
    Gram-negative Veillonella bacteria, digital illustration.
    Abstract green bacteria, computer illustration. — Stock Photo
    Abstract green bacteria, computer illustration.
    Egg cells on white background, digital illustration. — Stock Photo
    Egg cells on white background, digital illustration.
    Illustration of sperm fertilizing human egg cell. — Stock Photo
    Illustration of sperm fertilizing human egg cell.
    Trichophyton fungi on white background, digital illustration. — Stock Photo
    Trichophyton fungi on white background, digital illustration.
    Gram-positive Peptococcus bacteria, digital illustration. — Stock Photo
    Gram-positive Peptococcus bacteria, digital illustration.
    Thyroid cancer cells, illustration. — Stock Photo
    Thyroid cancer cells, illustration.
    Acetic acid bacteria — Stock Photo
    Acetic acid bacteria
    Illustration of human egg cell on blue background. — Stock Photo
    Illustration of human egg cell on blue background.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Toilet microbes on contaminated seat surface, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface, conceptual digital illustration.
    Visual rendering of Amoeba — Stock Photo
    Visual rendering of Amoeba
    Magnified digital illustration of implanted blastocyst cell. — Stock Photo
    Magnified digital illustration of implanted blastocyst cell.
    Illustration of yellow abscesses on kidney and close-up of bacteria. — Stock Photo
    Illustration of yellow abscesses on kidney and close-up of bacteria.
    Piece of cake and microscopic image of Salmonella bacteria, conceptual illustration. — Stock Photo
    Piece of cake and microscopic image of Salmonella bacteria, conceptual illustration.
    Illustration of Tuberculosis bacteria — Stock Photo
    Illustration of Tuberculosis bacteria
    Magnified digital illustration of morula cells. — Stock Photo
    Magnified digital illustration of morula cells.
    Destruction of a human embryo — Stock Photo
    Destruction of a human embryo
    Illustration of irregular scarred cortical surface of kidney and close-up of Enterococcus bacteria. — Stock Photo
    Illustration of irregular scarred cortical surface of kidney and close-up of Enterococcus bacteria.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration — Stock Photo
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration