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    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Long poles and kung fu spears arranged on racks in martial arts studio. — Stock Photo
    Long poles and kung fu spears arranged on racks in martial arts studio.
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte. — Stock Photo
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte.
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    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.
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Portrait of karate player performing karate stance in fitness studio — Stock Photo
    Portrait of karate player performing karate stance in fitness studio
    Female anatomical figure with detailed spleen, computer illustration. — Stock Photo
    Female anatomical figure with detailed spleen, computer illustration.
    Group of friends playing basketball. — Stock Photo
    Group of friends playing basketball.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Kung fu fighter training martial arts in fitness studio. — Stock Photo
    Kung fu fighter training martial arts in fitness studio.
    Structure of dog lymphatic system with lymph vessels, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, digital illustration.
    Illustration of silhouette of obese man with visible spleen. — Stock Photo
    Illustration of silhouette of obese man with visible spleen.
    Illustration of blue silhouette of obese woman with highlighted spleen on black background. — Stock Photo
    Illustration of blue silhouette of obese woman with highlighted spleen on black background.
    Illustration of figure of obese man with visible spleen. — Stock Photo
    Illustration of figure of obese man 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.
    White blood cell structure — Stock Photo
    White blood cell structure
    Computer illustration of bacterium surrounded by neutrophil white blood cells. — Stock Photo
    Computer illustration of bacterium surrounded by neutrophil white blood cells.
    Illustration of silhouette of obese man with visible spleen. — Stock Photo
    Illustration of silhouette of obese man with visible spleen.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate stance in fitness studio
    Boxer in helmet performing boxing stance in fitness studio — Stock Photo
    Boxer in helmet performing boxing stance in fitness studio
    Illustration of figure of obese man with visible spleen. — Stock Photo
    Illustration of figure of obese man with visible spleen.
    Illustration of transparent blue silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored spleen.
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole in fitness studio.
    Asteroid defense missile launched at asteroid — Stock Photo
    Asteroid defense missile launched at asteroid
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    Mid section of boxer wearing black strap on wrist in fitness studio — Stock Photo
    Mid section of boxer wearing black strap on wrist in fitness studio
    Spleen cancer in male body, conceptual computer illustration. — Stock Photo
    Spleen cancer in male body, conceptual computer illustration.
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Close up front view of a focused mixed-race male judo coach drinking water from a plastic bottle, standing in the gym taking a break in a training. — Stock Photo
    Close up front view of a focused mixed-race male judo coach drinking water from a plastic bottle, standing in the gym taking a break in a training.
    Blue senior female silhouette showing spleen in body. — Stock Photo
    Blue senior female silhouette showing spleen in body.
    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 karate player performing karate stance in fitness studio — Stock Photo
    Mid section of karate player performing karate stance in fitness studio
    Tired female boxer leaning on boxing ring in fitness studio — Stock Photo
    Tired female boxer leaning on boxing ring 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 female boxer performing boxing stance in boxing ring — Stock Photo
    Portrait of confident female boxer performing boxing stance in boxing ring
    Blue senior female silhouette showing spleen in body. — Stock Photo
    Blue senior female silhouette showing spleen in body.
    Red blood cells — Stock Photo
    Red blood cells
    Kung fu fighter practicing with long pole in fitness studio. — Stock Photo
    Kung fu fighter practicing with long pole in fitness studio.
    Illustration of female silhouette with highlighted spleen. — Stock Photo
    Illustration of female silhouette with highlighted spleen.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Female boxer practicing with trainer at fitness studio — Stock Photo
    Female boxer practicing with trainer at fitness studio
    Front high angle 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
    Front high angle 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.
    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
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Judokas practicing judo in a gym — Stock Photo
    Judokas practicing judo in a gym
    Close-up of millipede in defensive spiral position on wild plant. — Stock Photo
    Close-up of millipede in defensive spiral position on wild plant.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Karate fighter practicing with sai weapon in fitness studio. — Stock Photo
    Karate fighter practicing with sai weapon in fitness studio.
    Cropped view of karate fighter practicing martial arts in fitness studio. — Stock Photo
    Cropped view of karate fighter practicing martial arts in fitness studio.
    Mid section illustration of spleen in male body silhouette. — Stock Photo
    Mid section illustration of spleen in male body silhouette.
    Illustration of dendritic cell interacting with T-cells on black background. — Stock Photo
    Illustration of dendritic cell interacting with T-cells on black background.
    Illustration of transparent blue silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored spleen.
    Illustration of spleen in male body silhouette on white background. — Stock Photo
    Illustration of spleen in male body silhouette on white background.
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.