By Park Si-soo
An elderly woman ― confirmed to have recovered from coronavirus 18 days ago ― has tested positive again.
The woman, 92, is being treated at Ulsan University Hospital, but showing no typical symptoms of infection. Health authorities are examining how she became re-infected. She has two underlying conditions ― Alzheimer's disease and high blood pressure.
According to Ulsan City, she tested positive on Sunday morning. The test was part of a regular checkup for recovered coronavirus patients.
She had been declared as recovered from the first infection on Apr. 8, and has told authorities she has stayed indoors ― at her daughter's house ― since.
People who have lived with her ― her daughter, son-in-law and a grandchild ― have been put in self-isolation.