Extended Data Fig. 2: Flow cytometric analysis of nasal granulocytes.

Granulocytes in whole blood from one donor and fixed nasal scrapes from 2 individuals with or without COVID-19 were analysed using additional markers. The top row shows gating strategy to select granulocytes for one of the nasal cell samples. The bottom row shows contour plots of CD16 expression versus Siglec-8, CXCR4 and CD10 expression. Colours correspond to different samples, with black depicting the whole blood.