Tuberculosis - Infection and transmission

Watch or download our animation on how the human immune system attempts to contain a tuberculosis infection, and how the bacteria are transmitted to new people.

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Tuberculosis usually affects the respiratory system, but can develop in any part of the body. The human immune system commonly contains the infection, but a dormant infection can progress into serious disease.

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This animation is © The Wellcome Trust. It is freely available for private and educational use. For commercial use, please contact Wellcome Images: images@wellcome.ac.uk.