MAPK8 and disease arising from reactivation of latent virus: Latently infected (p24−) TCM cells (Fig. 5c) exhibited increased levels of p-p38 and p-JNK within 15 minutes of anisomycin stimulation relative to uninfected cells (Fig. 5d,e), demonstrating that latent infection confers sensitivity to p38 and JNK signaling.