Grail's liquid biopsy test has an approximate 20% sensitivity for stage one cancer.

“grail is i believe looking at exactly this method right they're using i think they're looking at methylation patterns of cell-free dna but they're doing it as a pan screen so it's give me 10 20 ml of blood and we're just going to look for all the cell free dna we're going to identify if there's cancer or non-cancer in there if there is cancer in there we're going to try to predict the tissue of origin how good can that get because right now the sensitivity for all stages is probably 50 percent with a specificity of about 99”