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Repeated COVID-19 Relapse of an Imported Patient Infected with SARS-CoV-2 Delta Variant of Concern by Songning Ding, Tao Ma, Rui Huang, Hengxue Wang, Jiacheng Liu, Jian Wang, Xiaomi Fan, Jie Li, Chao Wu, Nan Zhou, Huafeng Fan

Background: Repeated re-positive of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) B.1.617.2 (Delta) variants of concern (VOC) in recovered coronavirus disease 2019 (COVID-19) patients have not been reported yet.
Methods: We reported a rare case of repeated COVID-19 relapse during the post-discharge surveillance.
Results: This case had long-term viral shedding for 79 days.
Conclusions: This case highlights that longer observation and isolation periods need be considered for patients with SARS-CoV-2 delta VOC infection.

DOI: 10.7754/Clin.Lab.2022.220201