SELL and COVID-19: Baseline CD62L expression of unstimulated neutrophils from COVID-19 patients 3 to 6 months after active disease was lowered compared to healthy controls [median MFI, 65 x 104 (IQR 62 x 104- 77 x 104) vs. 90 x 104 (IQR 76 x 104- 98 x 104) p = 0.0003, Figure 3].