Bollocks, who cares about the Koreans, none of us retires there you silly fuck.
The important and missing fact is just where did she contract it. At Swampy/DM airport next to a bunch of kitchens checking in for a flight or was she in some skanky kitchen shithole hotel eating next to them? Or was it in a shopping mall next to a tour group in Bkk, Hua Hin or Patters?
Also, there ain't no cure or treatment, there is only a therapy to provide support while the body fights the virus eg ventilator for breathing and monitoring of the heart.