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.