KIT and infection: In this context, we recently reported that Sca-1 is not a reliable marker to distinguish myeloid progenitors from hematopoietic stem progenitor cells (Lin−Sca-1+c-kit+, LSK) during infection and inflammation because Lin−Sca-1−c-kit+ (LK) cells containing myeloid progenitors gain Sca-1 expression (Kanayama et al., 2020).