A closer look

Aluminum is great for soda cans, but occasionally causes the human immune system to absolutely lose its mind. To make vaccines more effective, scientists add adjuvants like aluminum salts to provoke a stronger defense. In extremely rare cases, this sparks Autoimmune Syndrome Induced by Adjuvants (Shoenfeld's syndrome), where genetically susceptible people develop chronic fatigue and joint pain because their hyper-stimulated immune system refuses to power down.