[bert]

For shade tree engineers, the way to prevent failure is to design and then add a large safety factor.

For north Korean shade tree communicable disease officials, the application of a generous quarantine safety factor is sort of a CYA pronouncement

[redshawk]

For north Korean shade tree communicable disease officials, the application of a generous quarantine safety factor is sort of a CYA pronouncement
.....

Certainly the officials would be shot if their quarantine time frame is wrong.