title: The acquired immune system: a vantage from beneath.
authors.affiliation: University of California, San Diego, La Jolla, CA 92093, USA.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Hedrick
mesh_terms: D000818:Animals; D005075:Biological Evolution; D006790:Host-Parasite Interactions; D006801:Humans; D007107:Immune System / Q000502:physiology*; D007109:Immunity; D007239:Infections / Q000401:mortality; D007448:Invertebrates / Q000276:immunology; D014774:Virulence