title: The natural environment and disease: an evolutionary perspective.
mesh_terms: D000818:Animals; D000829:Animals, Domestic; D005075:Biological Evolution; D004194:Disease / Q000209:etiology*; D004197:Disease Reservoirs; D004199:Disease Vectors; D004777:Environment; D006801:Humans; D011839:Radiation, Ionizing; D012919:Social Behavior