[consumer451]

It could be specific to a family, or with this broad a DNA + meta data dataset, it could be enough data to wipe out much of an entire group. Choose the common traits in people who self-identified as a group. English, Jews, Slavs, Native South Americans, non-Han, etc.

The problem with bio-weapons has always been "blow back." Narrowing the scope of the weapon would help a lot with that.

[jacquesm]

Exactly, the better the control the bigger the chance that a weapon like this would be used.

[anonymouskimmer]

Any narrowing of scope would be temporary.