Sensitivity to codeine. About 1% or less of kids have a genetic variation that makes them hypersensitive to codeine. Why not know about that, if you could? The line is going be crossed where it's better and safer to do it with genetics than with the old-fashioned testing we do now. The downside is, when we do whole genome sequencing, you discover everything. You might find out that your kid is at risk for something you didn't want to know about.