Although aluminum at high doses can cause a variety of clinical manifestations, the quantity of aluminum in vaccines is too small to cause a direct toxic effect. Indeed, the quantity of aluminum in biological specimens from those receiving aluminum-containing vaccines is indistinguishable from unvaccinated subjects. The concern that aluminum in vaccines might be associated with a rare autoimmune disease called macrophagic myofasciitis has been refuted by previous studies.
Studies in humans show that if doesn't end up accumulating unless your kidneys aren't working.