NLR, d-NLR and PLR can be affected by many factors

We have read the article by Yang et al, entitled The diagnostic and predictive role of NLR, d-NLR and PLR in COVID-19 patients with great interest. The authors emphasized that the NLR (Neutrophil to lymphocyte ratio) is an independent prognostic biomarker for COVID-19 patients. First of all, we congratulate the authors for their valuable contribution to the literature in these difficult conditions. However, we would like to add on a few cases that need more attention.

Automated summary

The article discusses the diagnostic and predictive roles of NLR, d-NLR and PLR in COVID-19 patients, with an emphasis on NLR as an independent prognostic biomarker. While acknowledging the authors' valuable contribution to the literature, attention is also drawn to cases that require more attention.