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The focus of the scandal is the long-term project for study of the Yanomami of Venezuela organized by James Neel, the human geneticist, in which Napoleon Chagnon, Timothy Asch, and numerous other anthropologists took part. The French anthropologist Jacques Lizot, who also works with the Yanomami but is not part of Neel- Chagnon project, also figures in a different scandalous capacity.

One of Tierney's more startling revelations is that the whole Yanomami project was an outgrowth and continuation of the Atomic Energy Comissions secret program of experiments on human subjects James Neel, the originator and director of the project, was part of the medical and genetic research team attached to the Atomic Energy Commission since the days of the Manhattan Project.

Tierney presents convincing evidence that Neel and Chagnon, on their trip to the Yanomami in 1968, greatly exacerbated, and probably started, the epidemic of measles that killed "hundreds, perhaps thousands" (Tierney's language-the exact figure will never be known) of Yanomami. The epidemic appears to have been caused, or at least worsened and more widely spread, by a campaign of vaccination carried out by the research team, which used a virulent vaccine (Edmonson B) that had been counter-indicated by medical experts for use on isolated populations with no prior exposure to measles exactly the Yanomami situation). Even among populations with prior contact and consequent partial genetic immunity to measles, the vaccine was supposed to be used only with supportive injections of gamma globulin.

We began this study assuming that, in Turner and Sponsel's words, we would be investigating 'an impending scandal' concerning flagrant wrongdoing by two celebrated scholars. Almost immediately, however, we discovered published evidence that the most serious allegations were false. Neel was not a eugenicist, did not cause the 1968 measles epidemic, and did not run nefarious experiments on unsuspecting human subjects. What he did was what any responsible physician would have done: vaccinate as many people as he could in a circle around the mission where the epidemic began. That these facts were available in the medical literature 30 years ago (Neel et al. 1970) made us wonder why Tierney had so badly distorted the facts. Perhaps it was because he had become an 'advocate,' to use his own words.

The first has to do with Tierney's use of an article by G. S. Wilson ("Measles as a Universal Disease," Amer. J of Diseases of Children 53: 219-23, 1962) to back up his claim that the Edmonston B measles vaccine is contraindicated. This is crucial to his broader argument that James Neel intentionally started a measles epidemic among the Yanomamo in 1968 by using this vaccine, and that he did this in order to observe its effect and test a eugenic theory.

Patrick Tierney's recent book Darkness in El Dorado makes very serious accusations of wrongdoing against Napoleon Chagnon, James Neel, and other scientists. Neel is accused of starting an epidemic among the Yanomamo in 1968 in order to observe its course as part of a secret experiment to test a eugenic theory. Chagnon is accused of aiding him, of fudging data, of staging events for his ethnographic films among other things, somehow causing the warfare that characterizes the Yanomamo.