[donozark]

30 day quarantine now in North Korea. I know of no other country that has imposed such a lengthy period. This concerns me and should all.

[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

[arthurus]

Apparently there are some cases that developed upt to three weeks after exposure.