Flu vaccines contain mercury in the form of thimerosal (ethylmercury), a brain toxin, which accumulates in the brain and other organs. “It’s incorporated into the brain for a lifetime,” says Dr. Blaylock. “After five or 10 years of flu shots, enough mercury accumulates in the brain that every single study agrees is neurotoxic. Mercury is extremely toxic to the brain even in very small concentrations, and there are thousands of studies that prove it.”