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    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Digital illustration of shaped virus cells. — Stock Photo
    Digital illustration of shaped virus cells.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Red virus particles with receptors on blue background. — Stock Photo
    Red virus particles with receptors on blue background.
    Woman with a bathrobe on the head on the head near the mountain — Stock Photo
    Woman with a bathrobe on the head on the head near the mountain
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Cancer cells in human brain, digital illustration. — Stock Photo
    Cancer cells in human brain, digital illustration.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Digital illustration of trypanosome parasites in blood vessel causing Chagas disease. — Stock Photo
    Digital illustration of trypanosome parasites in blood vessel causing Chagas disease.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Closeup of needle of syringe filled with vaccine from virus injected in cell on blurred background — Stock Photo
    Closeup of needle of syringe filled with vaccine from virus injected in cell on blurred background
    Computer illustration of unicellular fungus (yeast) Candida auris — Stock Photo
    Computer illustration of unicellular fungus (yeast) Candida auris
    Computer illustration of white adipose (fat) cells, lying in a matrix of collagen. Adipose tissue stores energy and helps insulate our bodies as well as cushioning the organs. — Stock Photo
    Computer illustration of white adipose (fat) cells, lying in a matrix of collagen. Adipose tissue stores energy and helps insulate our bodies as well as cushioning the organs.
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM). — Stock Photo
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM).
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    3d illustration of activated platelets and thrombocytes while healing and closure of wound. — Stock Photo
    3d illustration of activated platelets and thrombocytes while healing and closure of wound.
    Measles virus particles, digital illustration. — Stock Photo
    Measles virus particles, digital illustration.
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light — Stock Photo
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants — Stock Photo
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants
    Illustration showing the bacterial transformation process. A Neisseria gonorrhoeae bacterium releases chromosomal DNA (deoxyribonucleic acid, blue centre) with antibiotic resistance genes (yellow, centre) into the environment via lysis — Stock Photo
    Illustration showing the bacterial transformation process. A Neisseria gonorrhoeae bacterium releases chromosomal DNA (deoxyribonucleic acid, blue centre) with antibiotic resistance genes (yellow, centre) into the environment via lysis
    Uneven surface and cytoplasmic projections — Stock Photo
    Uneven surface and cytoplasmic projections
    Digital illustration of red migrating cancer cells. — Stock Photo
    Digital illustration of red migrating cancer cells.
    Brain neural network, computer illustration. — Stock Photo
    Brain neural network, computer illustration.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Puffball fungus spore — Stock Photo
    Puffball fungus spore
    Cells undergoing mitosis — Stock Photo
    Cells undergoing mitosis
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Conceptual illustration of red blood cells (erythrocytes) with oxygen molecules (white) in an artery. — Stock Photo
    Conceptual illustration of red blood cells (erythrocytes) with oxygen molecules (white) in an artery.
    Hepatitis C virus particles, digital illustration. — Stock Photo
    Hepatitis C virus particles, digital illustration.
    Pyramidal neurons of human brain cortex, computer illustration — Stock Photo
    Pyramidal neurons of human brain cortex, computer illustration
    Red blood cells, computer illustration — Stock Photo
    Red blood cells, computer illustration
    Fallopian tube cellular structure — Stock Photo
    Fallopian tube cellular structure
    3d illustration of a cross section of skin with melanoma in bloodstream and lymphatic tract. — Stock Photo
    3d illustration of a cross section of skin with melanoma in bloodstream and lymphatic tract.
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (blue) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (blue)
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM). — Stock Photo
    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM).
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    West Nile virus particles — Stock Photo
    West Nile virus particles
    Activated platelet cells — Stock Photo
    Activated platelet cells
    Human Fertilisation, computer illustration — Stock Photo
    Human Fertilisation, computer illustration
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Digital illustration of budding yeast cells in imaging flow cytometry. — Stock Photo
    Digital illustration of budding yeast cells in imaging flow cytometry.
    Scientist examining cultured cells under microscope. — Stock Photo
    Scientist examining cultured cells under microscope.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Soil bacteria, coloured scanning electron micrograph. — Stock Photo
    Soil bacteria, coloured scanning electron micrograph.
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    3d illustration of cancer cells connecting to tissue. — Stock Photo
    3d illustration of cancer cells connecting to tissue.
    Illustration of transmembrane proteins with ligands on white background. — Stock Photo
    Illustration of transmembrane proteins with ligands on white background.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Illustration of leucocyte cell surrounded by antibodies on black background. — Stock Photo
    Illustration of leucocyte cell surrounded by antibodies on black background.
    Medical illustration of bacteria in human intestine. — Stock Photo
    Medical illustration of bacteria in human intestine.
    Flying red bathrobe on the background of the mountains — Stock Photo
    Flying red bathrobe on the background of the mountains