CD14+ monocytes from Kawasaki disease patients induced elevated target HUVECs death in both direct contact (19.45 ± 3.90% vs 15.15 ± 3.87%; Tukey test, p = 0.026) and indirect contact (22.50 ± 7.69% vs 16.58 ± 3.77%; Tukey test, p = 0.033) co-culture systems (Fig. 4 a). Here, CD14 is linked to Kawasaki disease.