[nether]

> When I signed up the sample they took was spit in a vial.

Yes, and? I don't see the significance of the testing medium here. DNA sequencing from hair or blood or saliva will yield identical results.

[aarongolliver]

They're saying the testing medium itself made the test appear less scientific/accurate (to them) than it actually is. Perhaps if it had been a hair sample it would have appeared more scientific (again, to them).

[Kequc]

Yes that's right.

[SEJeff]

Yup and in both sources, it will be multiplied first via polymerase chain reaction, and then analyzed / sequenced.