IFNA1 and infection: While these modest levels of cytokine release from endothelial cells upon SARS‐CoV‐2 infection are lower than CXCL10 or IL‐6 induced in response to high concentrations of recombinant TNFα or IFNß (Supplementary figure 5d and e), these data show that endothelial cells express high basal levels of IL‐6 and that both cytokines are increased during infection.