The following article is a good read - informative, accurate and from
an insider who knows.

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http://articles.mercola.com/sites/articles/archive/2008/06/21/rebel-scientist-battles...

Dr. Shiv Chopra, as a vaccine and drug regulator for Health Canada for
nearly forty years, evaluated every red-hot topic in public health. He
tried, sometimes successfully, to protect the public from ineffective
and harmful vaccines, genetically modified foods, pesticides,
carcinogenic antibiotics and hormones used in food-producing animals,
and agricultural practices that promote Mad Cow Disease.

Unsurprisingly, he was fired from Health Canada in 2004 for
“insubordination” -- in other words, refusing to bow to corporate and
government pressure to give a pass to unsafe substances. Dr. Chopra
has now written a book, Corrupt to the Core, about his decades of
struggle to have the law recognized as being above political policy.