CD274 and visceral leishmaniasis: Expression of PD-L1 has been described in monocytes from a patient presenting diffuse cutaneous leishmaniasis (40), and only in low-density neutrophils (normal-density neutrophils did not expressed PD-L1) from human visceral leishmaniasis patients (12), but, to the best of the authors’ knowledge, this is the first description of PD-L1 expression upon in vitro interaction with Leishmania. Interestingly, similar to our results, it was shown that incubation of neutrophils ex vivo with LPS for 6 h also induced PD-L1 expression (41).