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    Illustration of antigen-presenting cell activity of dendritic cells through membrane-bound histocompatibility complex molecules. — Stock Photo
    Illustration of antigen-presenting cell activity of dendritic cells through membrane-bound histocompatibility complex molecules.
    Pathogenic bacteria in the blood stream — Stock Photo
    Pathogenic bacteria in the blood stream
    Nanobot in bloodstream with red erythrocytes, digital illustration. — Stock Photo
    Nanobot in bloodstream with red erythrocytes, digital illustration.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Common house dust mite — Stock Photo
    Common house dust mite
    Cancer cells and blood vessels — Stock Photo
    Cancer cells and blood vessels
    Abstract purple colored cancer cell on white background, digital illustration. — Stock Photo
    Abstract purple colored cancer cell on white background, digital illustration.
    Bacteriastrum sp. diatom algae — Stock Photo
    Bacteriastrum sp. diatom algae
    Structure of cellular organelles — Stock Photo
    Structure of cellular organelles
    Close-up of rack of cell cultures in bottles in laboratory. — Stock Photo
    Close-up of rack of cell cultures in bottles in laboratory.
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration.
    Animal cells with mitochondria, digital illustration. — Stock Photo
    Animal cells with mitochondria, digital illustration.
    Cell cultures under microscope in laboratory. — Stock Photo
    Cell cultures under microscope in laboratory.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem. — Stock Photo
    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem.
    Light micrograph (LM) of a vertical section through the pseudostratified columnar epithelium from the trachea, the tube in the throat leading from the mouth to the bronchus and the lungs. — Stock Photo
    Light micrograph (LM) of a vertical section through the pseudostratified columnar epithelium from the trachea, the tube in the throat leading from the mouth to the bronchus and the lungs.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Illustration of blue cell membrane on white background. — Stock Photo
    Illustration of blue cell membrane on white background.
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Tumor, illustration — Stock Photo
    Tumor, illustration
    Antibiotic resistant Pseudomonas aeruginosa bacterium, digital 3d illustration. — Stock Photo
    Antibiotic resistant Pseudomonas aeruginosa bacterium, digital 3d illustration.
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Erythrocytes and leukocytes blood cells in human blood vessel, digital illustration. — Stock Photo
    Erythrocytes and leukocytes blood cells in human blood vessel, digital illustration.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Pancreatic cancer cells — Stock Photo
    Pancreatic cancer cells
    Marsh marigold carpel — Stock Photo
    Marsh marigold carpel
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Colored scanning electron micrograph of human mesenchymal stem cell. — Stock Photo
    Colored scanning electron micrograph of human mesenchymal stem cell.
    Enteroviruses and neuron — Stock Photo
    Enteroviruses and neuron
    Cancer cell on plain background, digital illustration. — Stock Photo
    Cancer cell on plain background, digital illustration.
    Purple colored nerve cell on dark background, digital illustration. — Stock Photo
    Purple colored nerve cell on dark background, digital illustration.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Illustration of enzymes driving synthesis of energy-carrying molecule ATP. — Stock Photo
    Illustration of enzymes driving synthesis of energy-carrying molecule ATP.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia. — Stock Photo
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia.
    Female reproductive system and Gardnerella vaginalis bacteria attached to vaginal epithelial cells causing bacterial vaginosis, digital illustration. — Stock Photo
    Female reproductive system and Gardnerella vaginalis bacteria attached to vaginal epithelial cells causing bacterial vaginosis, digital illustration.
    Balamuthia mandrillaris amoeba organism, digital illustration. — Stock Photo
    Balamuthia mandrillaris amoeba organism, digital illustration.
    Nerve cell with pink colored axon on blue background, digital illustration. — Stock Photo
    Nerve cell with pink colored axon on blue background, digital illustration.
    Dividing prostate gland cancer cells, colored scanning electron micrograph. — Stock Photo
    Dividing prostate gland cancer cells, colored scanning electron micrograph.
    Magnified digital illustration of macrophage cell. — Stock Photo
    Magnified digital illustration of macrophage cell.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells.
    Egg cell with nucleus, digital illustration. — Stock Photo
    Egg cell with nucleus, digital illustration.
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    Friends looking at their smartphone on the streets of Madrid — Stock Photo
    Friends looking at their smartphone on the streets of Madrid
    Businesswoman talking on mobile phone in office — Stock Photo
    Businesswoman talking on mobile phone in office
    Young friends roommates cooking posing for friend using camera phone — Stock Photo
    Young friends roommates cooking posing for friend using camera phone
    Couple sitting on stairs and using mobile phone outside house — Stock Photo
    Couple sitting on stairs and using mobile phone outside house
    Chinese woman checking her phone in Madrid looking at mobile, Spain — Stock Photo
    Chinese woman checking her phone in Madrid looking at mobile, Spain
    Virus particles or virions — Stock Photo
    Virus particles or virions
    Young asian couple spending time together in city and using smartphone — Stock Photo
    Young asian couple spending time together in city and using smartphone
    A Latina mother and daughter take a selfie photo with a cell phone and — Stock Photo
    A Latina mother and daughter take a selfie photo with a cell phone and
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Older man using cell phone on sofa — Stock Photo
    Older man using cell phone on sofa
    Children using cell phone together on bed — Stock Photo
    Children using cell phone together on bed