SLEEPERS. “These new data suggest that we should consider that many or all humans are genetically “immunocompromised” to a greater or lesser extent for specific infections, including infection by viruses that constitute our virome. Thus, a virus present in all of us may cause disease only in those unfortunate enough to have a specific constellation of genes.”
http://www.sciencedirect.com/science/article/pii/S0092867409007831