An-Najah News - Jeong Eun-kyeong, director of the Korea Centers for Disease Control and Prevention said that South Korean officials reported 91 patients thought cleared of the new coronavirus had tested positive again. 

current studies said that there is a period of about two weeks between the onset of symptoms and clinical recovery of patients with mild COVID-19 disease. 

 Patient can be discharged from hospital after two consecutive negative results in a clinically recovered patient at least 24 hours apart according to the  WHO’s guidelines on clinical management.

according to the South Korean health officials it remains unclear what is behind the trend, with epidemiological investigations still under way.