"It was the Spaniards who gave the world the notion that an aristocrat's blood is not red but blue. The Spanish nobility started taking shape around the ninth century in classic military fashion, occupying land as warriors on horseback. They were to continue the process for more than five hundred years, clawing back sections of the peninsula from its Moorish occupiers, and a nobleman demonstrated his pedigree by holding up his sword arm to display the filigree of blue-blooded veins beneath his pale skin--proof that his birth had not been contaminated by the dark-skinned enemy." From Robert Lacey's Aristocrats. Little, Brown and Company, 1983, p. 6.
"Host defenses also evolve in response to attacks by parasites." No se presenta. Nota 1. Problema identificado: Immunodeficiencia ... Nota 2. Atentados Reactivos de Noruega. Primeras respuestas inhibidoras de sistema inmunitario. Esperar reacción células y tejidos independientes.