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    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Monocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Monocyte white blood cell in blood smear, digital illustration.
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    Structure of white blood cell — Stock Photo
    Structure of white blood cell
    Activated platelet cells — Stock Photo
    Activated platelet cells
    Climbing lily pollen — Stock Photo
    Climbing lily pollen
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Metaphase chromosome structure — Stock Photo
    Metaphase chromosome structure
    Schoolboy examining leaves with magnifying glass in school laboratory. — Stock Photo
    Schoolboy examining leaves with magnifying glass in school laboratory.
    Digital illustration of silhouette with liver inflammation and close-up of hepatitis B virus. — Stock Photo
    Digital illustration of silhouette with liver inflammation and close-up of hepatitis B virus.
    Laboratory assistants working in lab. — Stock Photo
    Laboratory assistants working in lab.
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan.
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph. — Stock Photo
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph.
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    3d rendered illustration of male cyclist anatomy on black background. — Stock Photo
    3d rendered illustration of male cyclist anatomy on black background.
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus — Stock Photo
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus
    Illustration of pink stem cell on black background. — Stock Photo
    Illustration of pink stem cell on black background.
    3d rendered illustration of skeleton in silhouette of male cyclist on black background. — Stock Photo
    3d rendered illustration of skeleton in silhouette of male cyclist on black background.
    Botulism bacterium. Illustration of botulism bacteria (Clostridium botulinum). These bacteria occur naturally in soil. They produce botulinum toxin, a powerful neurotoxin that can be ingested on contaminated, improperly cooked food — Stock Photo
    Botulism bacterium. Illustration of botulism bacteria (Clostridium botulinum). These bacteria occur naturally in soil. They produce botulinum toxin, a powerful neurotoxin that can be ingested on contaminated, improperly cooked food
    Oral trichomonas parasites, digital illustration. — Stock Photo
    Oral trichomonas parasites, digital illustration.
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Corynebacterium diphtheriae, computer illustration. C. diphtheriae is a gram-positive rod-shaped bacterium which is transmitted by respiratory droplets and causes the disease diphtheria — Stock Photo
    Corynebacterium diphtheriae, computer illustration. C. diphtheriae is a gram-positive rod-shaped bacterium which is transmitted by respiratory droplets and causes the disease diphtheria
    Parasites attacking spermatozoons fertilizing egg cell. — Stock Photo
    Parasites attacking spermatozoons fertilizing egg cell.
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Model of influenza A virus particle on white background, digital illustration. — Stock Photo
    Model of influenza A virus particle on white background, digital illustration.
    Lymphocytes white blood cells, digital illustration. — Stock Photo
    Lymphocytes white blood cells, digital illustration.
    Colored DNA double helix molecule, digital illustration. — Stock Photo
    Colored DNA double helix molecule, digital illustration.
    Antibodies attacking cancer cell, computer illustration — Stock Photo
    Antibodies attacking cancer cell, computer illustration
    Scientist closing lid of vial while laboratory testing. — Stock Photo
    Scientist closing lid of vial while laboratory testing.
    Illustration of visible colon in human body. — Stock Photo
    Illustration of visible colon in human body.
    Female researcher pipetting liquid in science laboratory. — Stock Photo
    Female researcher pipetting liquid in science laboratory.
    Liquid samples in quartz cuvettes containers. — Stock Photo
    Liquid samples in quartz cuvettes containers.
    Abstract computer illustration of RNA polymerase transcribing DNA to messenger RNA mRNA. — Stock Photo
    Abstract computer illustration of RNA polymerase transcribing DNA to messenger RNA mRNA.
    Person hand pipetting liquid into petri dish. — Stock Photo
    Person hand pipetting liquid into petri dish.
    Male sex cell — Stock Photo
    Male sex cell
    Human cytomegalovirus particles in blood flow, digital illustration. — Stock Photo
    Human cytomegalovirus particles in blood flow, digital illustration.
    Lymph nodes of male upper body, computer illustration. — Stock Photo
    Lymph nodes of male upper body, computer illustration.
    Colored scanning electron micrograph of osteoblast osteocyte bone cell. — Stock Photo
    Colored scanning electron micrograph of osteoblast osteocyte bone cell.
    Brucella bacteria, illustration. Brucella is a Gram negative, non-sporing, aerobic bacillus (rod- shaped bacteria) — Stock Photo
    Brucella bacteria, illustration. Brucella is a Gram negative, non-sporing, aerobic bacillus (rod- shaped bacteria)
    Normal human chromosomes — Stock Photo
    Normal human chromosomes
    Human papillomavirus, illustration. Human papilloma virus (HPV) causes warts, which mostly occur on the hands and feet. Certain strains also infect the genitals — Stock Photo
    Human papillomavirus, illustration. Human papilloma virus (HPV) causes warts, which mostly occur on the hands and feet. Certain strains also infect the genitals
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Colored digital illustration of green cancer cell. — Stock Photo
    Colored digital illustration of green cancer cell.
    Colored yellow DNA molecule damage, genetic disorder conceptual illustration. — Stock Photo
    Colored yellow DNA molecule damage, genetic disorder conceptual illustration.
    Eosinophilia blood smear with numerous eosinophils, digital illustration. — Stock Photo
    Eosinophilia blood smear with numerous eosinophils, digital illustration.
    Laboratory assistant in safety goggles looking at chemical flask. — Stock Photo
    Laboratory assistant in safety goggles looking at chemical flask.
    Neisseria gonorrhoeae bacteria, digital illustration. — Stock Photo
    Neisseria gonorrhoeae bacteria, digital illustration.
    Colored digital artwork of cancer cell. — Stock Photo
    Colored digital artwork of cancer cell.
    Computer illustration of staphylococci bacteria (Staphylococcus aureus) — Stock Photo
    Computer illustration of staphylococci bacteria (Staphylococcus aureus)
    Zika virus particles — Stock Photo
    Zika virus particles
    Scientist pipetting sample into tube for analytical testing in laboratory. — Stock Photo
    Scientist pipetting sample into tube for analytical testing in laboratory.
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration.
    Schoolboy using glassware and equipment in school laboratory. — Stock Photo
    Schoolboy using glassware and equipment in school laboratory.
    Microvilli of gallbladder surface — Stock Photo
    Microvilli of gallbladder surface
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa. — Stock Photo
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Person in latex glove holding test tube with ear of wheat — Stock Photo
    Person in latex glove holding test tube with ear of wheat
    Sperm cells in seminiferous tubule — Stock Photo
    Sperm cells in seminiferous tubule