N/L Patients with N/L ≥3.13 were reported to be more likely to develop severe illness and to require ICU admission (Liu et al., 2020c).N/L on admission was a risk factor for short-term progression of patients with moderate pneumonia to severe pneumonia (Feng et al., 2020). Confirmed to be of prognostic value in COVID-19 in several studies (Song et al., 2020, Wynants et al., 2020, Zhou et al., 2020d).