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    Karate fighter training martial arts in fitness studio. — Stock Photo
    Karate fighter training martial arts in fitness studio.
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Mid section of female boxer with boxing gloves in boxing ring at fitness studio — Stock Photo
    Mid section of female boxer with boxing gloves in boxing ring at fitness studio
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Illustration of silhouette of obese man with visible spleen. — Stock Photo
    Illustration of silhouette of obese man with visible spleen.
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Side view of a mixed race male judo coach and teenage mixed race male judoka, wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Side view of a mixed race male judo coach and teenage mixed race male judoka, wearing blue and white judogi, practicing judo during a training in a gym.
    Boxer wearing grappling gloves in fitness studio — Stock Photo
    Boxer wearing grappling gloves in fitness studio
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Front view of a focused mixed race male judo coach wearing white judogi, kneeling on mats in the gym before judo training. — Stock Photo
    Front view of a focused mixed race male judo coach wearing white judogi, kneeling on mats in the gym before judo training.
    Spleen cancer in female body, computer illustration. — Stock Photo
    Spleen cancer in female body, computer illustration.
    T-cell receptor-MHC-antigen complexes — Stock Photo
    T-cell receptor-MHC-antigen complexes
    Confident female boxer leaning on boxing ring in fitness studio — Stock Photo
    Confident female boxer leaning on boxing ring in fitness studio
    Female boxer wearing red strap on wrist in fitness studio — Stock Photo
    Female boxer wearing red strap on wrist in fitness studio
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Karate player in prayer pose in fitness studio — Stock Photo
    Karate player in prayer pose in fitness studio
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Front view close up of a mixed race male judo coach and teenage mixed race male judoka wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Front view close up of a mixed race male judo coach and teenage mixed race male judoka wearing blue and white judogi, practicing judo during a training in a gym.
    Front view of a teenage mixed race female judoka, sitting on gym mats, stretching her leg before judo training, her female colleague exercising in the background. — Stock Photo
    Front view of a teenage mixed race female judoka, sitting on gym mats, stretching her leg before judo training, her female colleague exercising in the background.
    Boxer performing boxing stance in fitness studio — Stock Photo
    Boxer performing boxing stance in fitness studio
    Illustration of transparent blue silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored spleen.
    Digital illustration of transparent elderly man body with visible orange-colored spleen. — Stock Photo
    Digital illustration of transparent elderly man body with visible orange-colored spleen.
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Lymphocyte white blood cells in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cells in human lymphatic system, digital illustration.
    T-cell receptor-MHC-antigen complex — Stock Photo
    T-cell receptor-MHC-antigen complex
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Grey senior female silhouette showing spleen in body. — Stock Photo
    Grey senior female silhouette showing spleen in body.
    Front view close up of a teenage mixed race female judoka wearing blue judogi, warming up before a training in a gym, striking a pose, stretching her leg up and kicking the air. — Stock Photo
    Front view close up of a teenage mixed race female judoka wearing blue judogi, warming up before a training in a gym, striking a pose, stretching her leg up and kicking the air.
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Portrait of boxer performing boxing stance in fitness studio — Stock Photo
    Portrait of boxer performing boxing stance in fitness studio
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    Illustration of senior man silhouette with visible spleen. — Stock Photo
    Illustration of senior man silhouette with visible spleen.
    Front view of a teenage mixed-race male judo player wearing white judogi, warming up before a training in a gym, striking a pose, stretching his leg up and kicking the air. — Stock Photo
    Front view of a teenage mixed-race male judo player wearing white judogi, warming up before a training in a gym, striking a pose, stretching his leg up and kicking the air.
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph. — Stock Photo
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph.
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Boxer performing boxing stance in fitness studio — Stock Photo
    Boxer performing boxing stance in fitness studio
    Portrait of boxer performing boxing stance in fitness studio — Stock Photo
    Portrait of boxer performing boxing stance in fitness studio
    Transparent female body silhouette with yellow colored spleen, digital illustration. — Stock Photo
    Transparent female body silhouette with yellow colored spleen, digital illustration.
    Portrait of confident boxer wearing black strap on wrist in fitness studio — Stock Photo
    Portrait of confident boxer wearing black strap on wrist in fitness studio
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole in fitness studio.
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole in fitness studio.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Illustration of female silhouette with spleen. — Stock Photo
    Illustration of female silhouette with spleen.
    Neutrophil white blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cells, digital illustration.
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    Karate fighter practicing martial arts in fitness studio. — Stock Photo
    Karate fighter practicing martial arts in fitness studio.
    Portrait of karate player performing karate stance in fitness studio — Stock Photo
    Portrait of karate player performing karate stance in fitness studio
    Cytotoxic T-cells capturing cancer cells, digital illustration. — Stock Photo
    Cytotoxic T-cells capturing cancer cells, digital illustration.
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Kung fu spears leaning on wall in martial arts studio. — Stock Photo
    Kung fu spears leaning on wall in martial arts studio.
    Close-up of metal dummy in fitness studio. — Stock Photo
    Close-up of metal dummy in fitness studio.
    Mid section of boxer performing boxing stance in fitness studio — Stock Photo
    Mid section of boxer performing boxing stance in fitness studio
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio