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    Young adult karate player performing karate stance in fitness studio — Stock Photo
    Young adult karate player performing karate 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
    Illustration of blue silhouette of obese woman with highlighted spleen on white background. — Stock Photo
    Illustration of blue silhouette of obese woman with highlighted spleen on white background.
    Lymphocyte white blood cells in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cells in human lymphatic system, digital illustration.
    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
    Cytotoxic T-cells capturing cancer cells, digital illustration. — Stock Photo
    Cytotoxic T-cells capturing cancer cells, digital illustration.
    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
    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
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Front view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym. — Stock Photo
    Front view of a mixed race male judo coach and teenage mixed race female judoka, wearing blue and white judogi, practicing judo during a training in a gym.
    Structure of dog lymphatic system with lymph vessels, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, digital illustration.
    Portrait of karate player performing karate stance in fitness studio — Stock Photo
    Portrait of 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
    Purple Macrophage, computer illustration — Stock Photo
    Purple Macrophage, computer illustration
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Computer illustration showing different stages of release of malaria merozoites from a red blood cell. — Stock Photo
    Computer illustration showing different stages of release of malaria merozoites from a red blood cell.
    Karate player in prayer pose in fitness studio — Stock Photo
    Karate player in prayer pose in fitness studio
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    Kung fu fighter practicing with long pole in fitness studio. — Stock Photo
    Kung fu fighter practicing with long pole in fitness studio.
    Mid section illustration of spleen in male body silhouette. — Stock Photo
    Mid section illustration of spleen in male body silhouette.
    Front high angle 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
    Front high angle view of two teenage Caucasian and mixed race female judokas wearing blue and white judogi, practicing judo during a sparring in a gym.
    Mid section of boxer wearing grappling gloves in fitness studio — Stock Photo
    Mid section of boxer wearing grappling gloves in fitness studio
    Karate player performing karate stance in fitness studio — Stock Photo
    Karate player performing karate stance in fitness studio
    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
    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
    T-cell receptor-MHC-antigen complex — Stock Photo
    T-cell receptor-MHC-antigen complex
    Lymphocytes attacking viruses — Stock Photo
    Lymphocytes attacking viruses
    3d illustration of lymphocytes attacking cancer cell in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cell in human body.
    Lymphocyte white blood cells in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cells in human lymphatic system, digital illustration.
    Bacterial infection spreading in bloodstream — Stock Photo
    Bacterial infection spreading in bloodstream
    Front view close up of a teenage Caucasian female judo player wearing blue judogi, kneeling on mats in the gym before judo training. — Stock Photo
    Front view close up of a teenage Caucasian female judo player wearing blue judogi, kneeling on mats in the gym before judo training.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Kung fu fighter practicing martial arts in fitness studio. — Stock Photo
    Kung fu fighter practicing martial arts in fitness studio.
    Antibody, or immunoglobulin molecules — Stock Photo
    Antibody, or immunoglobulin molecules
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Structure of dog lymphatic system with lymph vessels, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, digital illustration.
    Asteroid defense missile launched at asteroid — Stock Photo
    Asteroid defense missile launched at asteroid
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Mid section of karate player performing karate stance in fitness studio — Stock Photo
    Mid section of karate player performing karate stance in fitness studio
    Monocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Monocyte white blood cell in blood smear, digital illustration.
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Illustration of transparent gray silhouette of male body with colored spleen. — Stock Photo
    Illustration of transparent gray silhouette of male body with colored spleen.
    Transparent female body silhouette with yellow colored spleen, digital illustration. — Stock Photo
    Transparent female body silhouette with yellow colored spleen, digital illustration.
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    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.
    Front view of a teenage mixed race female judoka wearing blue judogi, kneeling and bowing on mats in the gym before judo training. — Stock Photo
    Front view of a teenage mixed race female judoka wearing blue judogi, kneeling and bowing on mats in the gym before judo training.
    Structure of dog lymphatic system with lymph vessels, cropped, digital illustration. — Stock Photo
    Structure of dog lymphatic system with lymph vessels, cropped, digital illustration.
    Illustration of spleen in male body silhouette on white background. — Stock Photo
    Illustration of spleen in male body silhouette on white background.
    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
    Side view close up of a focused teenage mixed race female judo player wearing white judogi, taking a breath and resting during a sparring in a gym. — Stock Photo
    Side view close up of a focused teenage mixed race female judo player wearing white judogi, taking a breath and resting during a sparring in a gym.
    Karate fighter practicing with wooden dummy in fitness studio. — Stock Photo
    Karate fighter practicing with wooden dummy in fitness studio.
    Portrait of confident female boxer performing boxing stance in boxing ring — Stock Photo
    Portrait of confident female boxer performing boxing stance in boxing ring
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Karate fighter practicing with wooden dummy in fitness studio. — Stock Photo
    Karate fighter practicing with wooden dummy in fitness studio.
    Confident female boxer performing boxing stance in fitness studio — Stock Photo
    Confident female boxer performing boxing stance in fitness studio
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    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