“Vaccinations are the application of evolutionary principles in action. If we can control the contact made between pathogen and lymphocyte populations, we can go a long way toward eliminating disease.108 It doesn’t require total annihilation but rather a control on population dynamics. Vaccines are the way we use selective cloning to keep a pathogenic population in a state of benign coexistence. The process is based on evolution, as pointed out by Nobel laureate Susumu Tonegawa: “Genes can mutate and recombine. These dynamic characteristics of genetic material are essential elements of evolution. Do they also play an important role during the development of a single multicellular organism? Our results strongly suggest that this is the case for the immune system.”