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Studies have found that multi-cancer blood tests can aid in the early detection of certain types of cancer in healthy individuals by detecting tumor signals in the blood before symptoms appear. However, their accuracy remains limited, especially in the early stages, as a positive result does not confirm the presence of cancer at that moment, and a negative result does not rule out the possibility of having cancer. Additionally, these tests are still in the research and development phase and have not yet demonstrated their effectiveness in reducing mortality, being restricted to certain groups of people. Therefore, while promising, they are still an emerging technology that requires further studies to establish their usefulness and importance within routine screening programs.
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