Galleri test is a new type of blood test for cancer. The test promises to revolutionise cancer diagnosis.
Trials have started in UK to see how well the test works in real world.
Within a few years, we should be able to see early results.
Just because a cancer can be diagnosed early, it does not automatically mean that it will make patients live longer.
Let’s say, a person is diagnosed with a serious cancer at age of 60 yrs and dies of cancer at age of 65 yrs.
Any test that detects the cancer early ( before the age of 60) should make this person live longer than 65 years.
If the test , for example, detects the cancer at the age of 55 instead of 60, but the person still dies of cancer at 65, then it is a worthless test.
Hopefully, the trial will thoroughly analyse the outcome to see whether the test is of overall benefit.
NHS launches world first trial for new cancer test. 13 September 2021
BBC news. Galleri cancer test: What is it and who can get it? 13 Sept 2021
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