ALB and chronic obstructive pulmonary disease: Elderly patients with COPD and admission blood eosinophil count ≥ 150 cells/μL but not those with admission blood eosinophil count < 150 cells/μL were found to be associated with severe COVID‐19 disease with respiratory and systemic complications, in multivariate analysis adjusted for CCI, serum albumin level, and lymphocyte count.