A 1998 study in the Lancet medical journal claiming a link between vaccines and autism was retracted last year for being scientifically unsound. But a new investigation claims the study wasn't just wrong—it was also an "elaborate fraud."
In Bangladesh, a country of 160 million, some 77 million people have been poisoned by arsenic in the drinking water, according to a 10-year Lancet study. The WHO calls it "the largest mass poisoning of a population in history." [BBC]
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