I was told about a book "The Body Hunters: Testings New Drugs on the World's Poorest Patients" by Sonia Shah. It was published by The New Press, and it had an approving quote from Publisher's Weekly on the site. (Among others, it also had one from John Le Carre, although I don't know he has any credentials.)
The claim is that very poor and sick Africans are used for pharmaceutical testing because they're desperate and the pharma companies don't have to abide by any ethical standards. They can collect data cheap.
Is this true?