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    Front view of a middle aged Caucasian male instructor giving self defence training in a boxing gym demonstrating a hold on a young mixed race man, while another young man looks on — Stock Photo
    Front view of a middle aged Caucasian male instructor giving self defence training in a boxing gym demonstrating a hold on a young mixed race man, while another young man looks on
    Structure of dog lymphatic system with lymph vessels, cropped, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, cropped, 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.
    Immune response to cancer — Stock Photo
    Immune response to cancer
    Transparent male silhouette with colored spleen, computer illustration. — Stock Photo
    Transparent male silhouette with colored spleen, computer illustration.
    Transparent female body silhouette with yellow colored spleen, digital illustration. — Stock Photo
    Transparent female body silhouette with yellow colored spleen, digital illustration.
    Blue senior female silhouette showing spleen in body. — Stock Photo
    Blue senior female silhouette showing spleen in body.
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    High angle front 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
    High angle front 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.
    Mid section illustration of spleen in male body silhouette. — Stock Photo
    Mid section illustration of spleen in male body silhouette.
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Portrait of confident female boxer performing boxing stance in boxing ring — Stock Photo
    Portrait of confident female boxer performing boxing stance in boxing ring
    Mid section illustration of spleen in male body silhouette. — Stock Photo
    Mid section illustration of spleen in male body silhouette.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Portrait of karate player performing karate stance in fitness studio — Stock Photo
    Portrait of karate player performing karate stance in fitness studio
    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.
    Karate fighter practicing with sai weapon in fitness studio. — Stock Photo
    Karate fighter practicing with sai weapon in fitness studio.
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Illustration of female silhouette with highlighted spleen. — Stock Photo
    Illustration of female silhouette with highlighted spleen.
    Side view of a mixed race male judo coach wearing white judogi, warming up before a training in a gym, striking a pose, punching the air. — Stock Photo
    Side view of a mixed race male judo coach wearing white judogi, warming up before a training in a gym, striking a pose, punching the air.
    Grey senior female silhouette showing spleen in body, illustration. — Stock Photo
    Grey senior female silhouette showing spleen in body, illustration.
    Portrait of a confident teenage Caucasian female judoka wearing blue judogi, standing in the gym with her arms crossed and looking straight into a camera. — Stock Photo
    Portrait of a confident teenage Caucasian female judoka wearing blue judogi, standing in the gym with her arms crossed and looking straight into a camera.
    Judokas practicing judo during a sparring in a gym — Stock Photo
    Judokas practicing judo during a sparring in a gym
    Spleen cancer in male body, conceptual computer illustration. — Stock Photo
    Spleen cancer in male body, conceptual computer illustration.
    Karate player in prayer pose in fitness studio — Stock Photo
    Karate player in prayer pose in fitness studio
    Karate fighter training martial arts in fitness studio. — Stock Photo
    Karate fighter training martial arts in fitness studio.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Confident karate player tying belt in fitness studio — Stock Photo
    Confident karate player tying belt in fitness studio
    Karate fighter practicing martial arts in fitness studio. — Stock Photo
    Karate fighter practicing martial arts in fitness studio.
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance 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
    Cancer cells, computer illustration — Stock Photo
    Cancer cells, computer illustration
    Illustration of silhouette of obese man with visible spleen. — Stock Photo
    Illustration of silhouette of obese man with visible spleen.
    Mid section of female boxer wearing red strap on wrist in fitness studio — Stock Photo
    Mid section of female boxer wearing red strap on wrist in fitness studio
    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.
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Judokas practicing judo in a gym — Stock Photo
    Judokas practicing judo in a gym
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Side view of a teenage mixed race male judoka wearing white judogi, kneeling and bowing on mats in the gym before judo training. — Stock Photo
    Side view of a teenage mixed race male judoka wearing white judogi, kneeling and bowing on mats in the gym before judo training.
    Frontal illustration of blue silhouette of obese woman with highlighted spleen on black background. — Stock Photo
    Frontal illustration of blue silhouette of obese woman with highlighted spleen on black background.
    Portrait of boxer performing boxing stance in fitness studio — Stock Photo
    Portrait of boxer performing boxing stance in fitness studio
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus. — Stock Photo
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus.
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    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
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Side view of two teenage Caucasian and mixed race female judokas wearing blue and white judogi, practicing judo during a sparring in a gym. — Stock Photo
    Side view of two teenage Caucasian and mixed race female judokas wearing blue and white judogi, practicing judo during a sparring in a gym.
    Illustration of female silhouette with painful spleen. — Stock Photo
    Illustration of female silhouette with painful spleen.
    Illustration of antibodies responding to an infection with the SARS-CoV-2 coronavirus (centre). The virus causes a mild respiratory illness (Covid-19) that can develop into pneumonia and be fatal in some cases — Stock Photo
    Illustration of antibodies responding to an infection with the SARS-CoV-2 coronavirus (centre). The virus causes a mild respiratory illness (Covid-19) that can develop into pneumonia and be fatal in some cases
    Antibody, or immunoglobulin molecules — Stock Photo
    Antibody, or immunoglobulin molecules
    Karate fighter practicing martial arts in fitness studio. — Stock Photo
    Karate fighter practicing martial arts in fitness studio.
    Spleen cancer in male body, conceptual computer illustration. — Stock Photo
    Spleen cancer in male body, conceptual computer illustration.
    Rear view of a teenage mixed race female judoka wearing blue judogi, practicing with a judo jo stick during a training with a coach in a gym. — Stock Photo
    Rear view of a teenage mixed race female judoka wearing blue judogi, practicing with a judo jo stick during a training with a coach in a gym.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Illustration of transparent blue silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored spleen.