Figure 2. . Circulating DPP4 activities stratified by disease severity and outcome categories.

(A) Circulating DPP4 activity in different COVID-19 disease severity groups at blood sampling. (B) Circulating DPP4 activity in different COVID-19 peak disease severity (‘outcome’) groups (study groups as described in the text). Median: small boxes and Q1–Q3: large boxes are indicated.