Nice to have confirmation.
For those who haven't heard, adjuvants can increase the efficiency of a vaccine - producing stronger immunity with less active ingredient.
https://en.wikipedia.org/wiki/Immunologic_adjuvant
...and one of the fairly boring adjuvants is aluminum hydroxide. People ingest it if they have too much stomach acid. In a vaccine, its presence helps stabilize proteins in a solution (prevents them from precipitating out) and provokes the interest of the immune system, causing a local secretion of uric acid from tissue, which in turn attracts monocytes and dendrite cells.