During primary infection, neutrophils were found in large aggregates in granuloma cores and expressed CXCL2, a chemokine known to promote feed-forward neutrophil recruitment and neutrophil swarming (Lentini et al., 2020), a phenomenon that has previously been associated with tissue damage (Kienle and Lämmermann, 2016; Brandes et al., 2013; Uderhardt et al., 2019; Peiseler and Kubes, 2019; Lämmermann et al., 2013). The gene discussed is CXCL2; the disease is infection.