label: Unusual virus reactivation
label_lc: unusual virus reactivation
description: "Reactivation is the mechanism whereby a latent virus that has infected a host cell switches to a lytic stage, undergoing productive viral replication and allowing the virus to spread. This term refers to reactivation regarded as unusual because of frequency, intensity, location, or nature of the virus, in the sense that the reactivation would not be observed in an immunocompetent host."