The results showed that lymphocyte count and albumin on admission were the independent early predictors for severe COVID-19 (Table 2), and the severe COVID-19 risk model was constructed as following: Logit(P) = 15.779 − 2.531 × Initial lymphocyte count ( × 109/L)  − 0.346 × Initial albumin (g/L). Here, ALB is linked to COVID-19.