Limitations:
There are some limitations to this study. Due to the short follow-up period, the long-term prognosis of patients could not be assessed. Besides, this study failed to find direct evidence of SARS-CoV-2 infection in the patients’ renal biopsy specimens. In previous studies, SARS-CoV-2 was detected by electron microscopy (TEM)[13], immunohistochemistry (IHC)[14], RNA in situ hybridization (RNA-ISH)[15] and reverse transcription-polymerase chain reaction(RT-PCR)[16], but the above positive results were all from autopsy. SARS-CoV-2 has rarely been detected in renal biopsy specimens. The kidney injury associated with SARS-CoV-2 infection in non-critical patients may mainly be caused through indirect mechanisms.