While some co-infected CD8-depleted mice did succumb at later timepoints, they displayed symptoms similar to MV IC infection of NSE-CD46+/RAG-2 KO mice (hunched/kyphotic posture and ruffled appearance) and not those observed with symptomatic co-infected immunocompetent mice (seizures leading to death and the characteristic decerebrate posture). Here, CD8A is linked to infection.