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Dear Editor Coronavirus disease 2019 (COVID-19) is a human infectious disease caused by a coronavirus with high infectivity and high mortality.1,2 Current research data indicate that most of the cases are mild and can be cured. In order to cope with the situation of re-positive nucleic acid test in cured patients, the discharge criteria for confirmed patients are clearly defined,3 such as 14 days of isolation management and required health monitoring. But even so, Luo et al4 reported recovered patients with COVID-19 who retested positive for the virus in many places. What does this phenomenon mean? Is it contagious? No, current evidence suggests that we do not have to panic. First, they have no obvious clinical symptoms, such as fever, severe cough or symptoms of respiratory distress. Second, those in close contact with them were not infected. In this paper, we review the reasons why nucleic acid tests are positive again as well as the clinical characteristics of recovered patients with COVID-19.

Clinical Characteristics of Recovered Patients with COVID-19 Who Retested Positive for the Virus