TAGLN and COVID-19: COVID-19 patients were divided into T1 group (the expression of serum transgelin was lower than 0.06 ng/mL), T2 group (the expression of serum transgelin was from 0.06 to 1.02 ng/mL), and T3 group (the expression of serum transgelin was higher than 1.02 ng/mL) in accordance with the tertitles of transgelin expression.