ALB and COVID-19: Univariate analysis indicated physical status score (p = 0.004), PD-L1 expression (p = 0.026), COVID-19 vaccination (p = 0.003), NLR (p < 0.001), albumin (p < 0.001), and fibrinogen (p = 0.001) checked before initial ICIs treatment were independent prognostic factors for OS in NSCLC patients with ICIs treatment.