In other words, we have these hijackers -- you've seen this slide before, from four years ago -- a parasite that infects the brain and induces even suicidal behavior, on behalf of a cause other than one's own genetic fitness.
–ustedes vieron esta diapositiva, hace cuatro años–, un parásito infecta el cerebro y provoca incluso conductas suicidas en pro de una causa diferente de la propia salud genética.