Multi-canceR Early-detection Test in Asymptomatic Individuals (PREVENT)

Inclusion Criteria: * Participants must be able to provide a written informed consent form * Participants must not have received any colonoscopy, abdominal MRI/CT, low-dose CT, or chest CT within 5 years before signing the informed consent form * Participants must be able to provide blood samples for study tests * Participants must be between 40 and 75 years old Exclusion Criteria: * Individuals who have an acute infection or inflammation within 14 days prior to recruitment * Individuals with cancer-associated clinical symptoms or suspected of cancer * Recipient of organ transplant or prior non-autologous (allogeneic) bone marrow or stem cell transplant * Recipient of blood transfusion within 7 days prior to recruitment * Individuals who have pure ground-glass opacity * Unable to provide blood samples for the multi-cancer early detection blood test * Individuals who are unable to tolerate standard-of-care cancer screening tests or have contraindications of standard-of-care cancer screening tests * Individuals who have taken medication with anti-tumor effects within 30 days prior to recruitment * Individuals who have received or are undergoing curative cancer treatment within three years prior to recruitment * Individuals with hemorrhagic diseases * Individuals with autoimmune diseases * Individuals who are pregnant or lactating * Individuals who have severe comorbidities that are not suitable for participating in the trial judged by researchers