An Australian trial has uncovered cancer and other conditions in young patients with no symptoms. It works by scanning DNA for potential problems down the track. 

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DNA screening trial detects cancer in young Australians

https://api.omny.fm/orgs/fa326977-3de5-4283-9b8b-af3500c58607/clips/eccaba0e-d99d-4b8b-9e01-b3d4008e93b5/transcript