Difference of clinical characteristics in patients with reinfection and primary infection variants of SARS-CoV-2: a retrospective study in China.

Background: The number of patients experiencing re-infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is progressively increasing. In this study, we aimed to explore the differences in clinical characteristics between patients with primary infection and those with re-infection of SARS-CoV-2.

Methods: A retrospective data analysis was conducted involving patients diagnosed with coronavirus disease 2019 between April 1, 2023, and June 20, 2023.