There will be some Holidays coming up like Chuseok and Korean New Years. If you are planning to go outside of Korea. You will be Quarantined when you return. If you are quarantined, you will be using your sick days. (You have 15 days sick leave)
Schools may ask you to not go outside Korea because of the Quarantine week. Because you are leaving outside of Korea, schools will be missing an English teacher for that time being.
There's a thread on this policy on Dave's ESL Cafe as well.
I'm not sure how long the quarantine week has been in place since for public school teachers, but we've seen similar measures since spring, when a big chain of hagwon tried to take away passports and a local university announced its own quarantine policy, apparently coming from the Ministry of Education. But I wonder how effective it would be now. With roughly 10,000 cases in South Korea, and swine flu popping up in schools all over the place, seems you're at as great a risk in the country than out. Especially if it's only the foreign teachers being checked out and quarantined when they return from abroad, as I've heard from a number of people.
As I stated in a comment to Chris' post, we have to ask if schools are prepared to fire teachers for catching swine flu. It's happened before, and certainly if districts are doing what SMOE's doing, would teachers be punished for swine flu in a roundabout way by being disciplined for disobeying orders?
A month after letting 100 teachers go days before they were supposed to fly to Korea, the hits just keep on coming for SMOE. Still no comment on that issue from SMOE, by the way.