MASP2 and hemolytic-uremic syndrome: Interestingly, in tubuli from COVID-19 biopsies we observed a higher collectin 11 mRNA expression compared to 1 year biopsies, HUS and ATI controls (Supplemental Figure 1) and MASP-2 deposition in some of the COVID-19 cases, indicating that activation of the lectin pathway in COVID-19 was not restricted to lung or skin (21).