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    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Virus particles in blood stream, digital illustration. — Stock Photo
    Virus particles in blood stream, digital illustration.
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Medical illustration of artificial heart valve. — Stock Photo
    Medical illustration of artificial heart valve.
    Blood vessel with blood cells — Stock Photo
    Blood vessel with blood cells
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    Medical illustration of female lymphatic system with heart — Stock Photo
    Medical illustration of female lymphatic system with heart
    Nervous and circulatory systems — Stock Photo
    Nervous and circulatory systems
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Sickle cell anemia — Stock Photo
    Sickle cell anemia
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    Ebola virus particles in blood, digital illustration. — Stock Photo
    Ebola virus particles in blood, digital illustration.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Human brain with network of blood vessels — Stock Photo
    Human brain with network of blood vessels
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy. — Stock Photo
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy.
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept. — Stock Photo
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept.
    Ebola virus in blood and close-up of virions, digital illustration. — Stock Photo
    Ebola virus in blood and close-up of virions, digital illustration.
    Coronary angioplasty stent insertion — Stock Photo
    Coronary angioplasty stent insertion