@article{3103153, title = "A Case of SARS-CoV-2 Clinical Relapse after 4 Negative RT-PCR Tests in Greece: Recurrence or Reinfection?", author = "Konstantinou, F. and Skrapari, I. and Bareta, E. and Bakogiannis, N. and Papadopoulou, A.-M. and Bakoyiannis, C.", journal = "Clinical Medicine Insights: Case Reports", year = "2021", volume = "14", publisher = "SAGE Publications Ltd", doi = "10.1177/11795476211009813", keywords = "analgesic agent; C reactive protein; dexamethasone; remdesivir, adult; arterial oxygen saturation; Article; bone metastasis; cancer palliative therapy; case report; clinical article; coronavirus disease 2019; crackle; death; dyspnea; esophagus cancer; fever; Greece; human; hypotension; liver metastasis; lung auscultation; lung consolidation; lung metastasis; lymphocytopenia; male; middle aged; musculoskeletal pain; oropharyngeal swab; productive cough; real time polymerase chain reaction; reinfection; relapse; respiratory distress; respiratory failure; thorax radiography; thrombocytopenia", abstract = "SARS-CoV-2 pandemic is the greatest public health concern of the year 2020. There are several worldwide reports of patients who have managed to recover from SARS-CoV-2 infection with negative PCR test results, that for unknown reasons convert back to positive PCR. We report a case of a patient in our hospital who developed positive PCR test results for SARS-CoV-2, after 4 consecutive results that were negative, along with a full-blown clinical syndrome of SARS-CoV-2 infection. © The Author(s) 2021." }