The liquid biopsy - developed by US and Australian scientists - could be avaliable within the next few years.
It comes as new figures show an increase in lung cancer deaths - the result of an increase in women smoking in the 1970s.
New blood test could detect cancers before they become deadly
Undated artist impression of a neutrophil attacking a cancer cell Source: AAP
The lives of millions of people around the world could be saved with a new blood test that can detect eight common cancers before they become deadly.
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