Immunohistochemistry(IHC) staining confirmed massive MHV-68 lytic virus protein expressionpredominantly localized to the epithelium 6 days after MHV-68 infection,i.e., during the acute infection phase (Figure 8B), and comparable to the whole mount analysisshown in Figure 2B.Compared to controls, 24 h after CNP exposure increased lytic proteinexpressing cells were detected in the lungs, indicating MHV-68 reactivation(Figure 8C,D). Here, CNP is linked to infection.