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    Chateau Gaillard; Les Andelys, Normandy, France — Stock Photo
    Chateau Gaillard; Les Andelys, Normandy, France
    Judoka doing push ups on gym mats — Stock Photo
    Judoka doing push ups on gym mats
    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.
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Front view mid section of judoka standing on gym mats, tying up the yellow belt of blue judogi. — Stock Photo
    Front view mid section of judoka standing on gym mats, tying up the yellow belt of blue judogi.
    Karate fighter practicing with long pole in fitness studio. — Stock Photo
    Karate fighter practicing with long pole 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
    Illustration of spleen in male body silhouette on white background. — Stock Photo
    Illustration of spleen in male body silhouette on white background.
    Close-up of confident female boxer in fitness studio — Stock Photo
    Close-up of confident female boxer in fitness studio
    Illustration of senior man silhouette with visible spleen. — Stock Photo
    Illustration of senior man silhouette with visible spleen.
    Karate fighter practicing with sai in fitness studio. — Stock Photo
    Karate fighter practicing with sai in fitness studio.
    Illustration of female silhouette with highlighted spleen. — Stock Photo
    Illustration of female silhouette with highlighted spleen.
    Cropped view of karate fighter practicing martial arts in fitness studio. — Stock Photo
    Cropped view of karate fighter practicing martial arts in fitness studio.
    T-cell receptor-MHC-antigen complexes — Stock Photo
    T-cell receptor-MHC-antigen complexes
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Mid section of karate player performing karate stance in fitness studio — Stock Photo
    Mid section of karate player performing karate stance in fitness studio
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    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.
    Illustration of spleen in male body silhouette on white background. — Stock Photo
    Illustration of spleen in male body silhouette on white background.
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    White blood cell structure — Stock Photo
    White blood cell structure
    Antibodies attacking coronavirus particle, illustration. — Stock Photo
    Antibodies attacking coronavirus particle, illustration.
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Transparent male silhouette with colored spleen, computer illustration. — Stock Photo
    Transparent male silhouette with colored spleen, computer illustration.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Cytotoxic T-cells capturing cancer cells, digital illustration. — Stock Photo
    Cytotoxic T-cells capturing cancer cells, digital illustration.
    Sandbags in rows at the water's edge to prevent erosion of the beach — Stock Photo
    Sandbags in rows at the water's edge to prevent erosion of the beach
    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
    Cancer cells, computer illustration — Stock Photo
    Cancer cells, computer illustration
    High angle close up view of a wooden judo jo stick lying on red gym mats in sports hall during judo training. — Stock Photo
    High angle close up view of a wooden judo jo stick lying on red gym mats in sports hall during judo training.
    Illustration of senior man silhouette with visible spleen. — Stock Photo
    Illustration of senior man silhouette with visible spleen.
    Boxer performing boxing stance in fitness studio — Stock Photo
    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
    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 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
    Karate player in prayer pose in fitness studio — Stock Photo
    Karate player in prayer pose 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
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    White blood cell structure — Stock Photo
    White blood cell structure
    Structure of dog lymphatic system with lymph vessels, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, digital illustration.
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    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.
    Illustration of senior man silhouette with visible spleen. — Stock Photo
    Illustration of senior man silhouette with visible spleen.
    Side view full body of soldier in camouflage outfit standing on knee before military service with small girl — Stock Photo
    Side view full body of soldier in camouflage outfit standing on knee before military service with small girl
    Karate fighter practicing with sai weapon in fitness studio. — Stock Photo
    Karate fighter practicing with sai weapon in 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.
    Digital illustration of senior man anatomy showing spleen tumour. — Stock Photo
    Digital illustration of senior man anatomy showing spleen tumour.
    Lymphocyte white blood cell in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cell in human lymphatic system, digital illustration.
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    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
    Karate player punching boxing bag in fitness studio — Stock Photo
    Karate player punching boxing bag in fitness studio
    Karate fighter practicing with sai weapon in fitness studio. — Stock Photo
    Karate fighter practicing with sai weapon in fitness studio.
    Illustration of spleen in male body silhouette. — Stock Photo
    Illustration of spleen in male body silhouette.
    Illustration of silhouette of obese man with visible spleen. — Stock Photo
    Illustration of silhouette of obese man with visible spleen.
    Portrait of boxer performing boxing stance in fitness studio — Stock Photo
    Portrait of boxer performing boxing stance in fitness studio
    Boxer in helmet performing boxing stance in fitness studio — Stock Photo
    Boxer in helmet performing boxing stance in 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