Yoon Se Ah has tested positive for COVID-19.

On September 12 KST, the 'SKY Castle' actress notified fans via a post on her Instagram account, writing, "I'm in the middle of spending Chuseok without loneliness together with COVID-19. Thanks to the neighbor who put a pretty bowl in front of the door and went back in a hurry, I can take out the holiday food she brought and try to cheer up. Everyone, take care of your body and mind. The wise quarantine life. It really hurts. Go away, plague."

In the same post, she shares an image of the Chuseok food prepared for her, including a few sticks of vitamins and supplements.

Meanwhile, Yoon Se Ah most recently appeared on the MBC and ENA PLAY variety show 'My Heart Beats 38.5,' which concluded back in July.