MKI67 and viral encephalitis: Our findings reveal several novel insights into the impact of viral encephalitis on adult neurogenesis: Employing KI-67, a reliable marker for proliferating cells expressed during mitosis (Bruno and Darzynkiewicz, 1992) our investigation showed a reduction in hilar cell proliferation during the acute phase of infection, aligning with earlier findings in different in vitro and in vivo models of CNS viral infections (Li et al., 2016; McGrath et al., 2017; Souza et al., 2016).