For example, three ARDS serum samples had high anti-interleukin-6 (IL-6) autoantibody titers with values of 34,213, 60,719, and 255,074 LU, which were all markedly higher than the GMT of anti-IL-6 antibodies in the controls with a value of 2,347 LU [95% confidence interval (CI); 2,080-2,649] (Figure 1A). Here, IL6 is linked to acute respiratory distress syndrome.