Serp‐1 treatment improves outcomes in gamma herpesvirus‐induced vasculitis and lung infection (Chen et al, 2013), pristane‐induced diffuse alveolar hemorrhage (DAH; Guo et al, 2021), and numerous animal models of vascular injury and allograft transplants (Lucas & McFadden, 2004; Chen et al, 2013; Yaron et al, 2020). The gene discussed is SERP1; the disease is vasculitis.