Pfizer knew that the vaccine materials did not remain in the deltoid muscle.

NAOMI WOLF REVEALS SHOCKING DETAILS IN “THE PFIZER PAPERS” - Del Bigtree
https://rumble.com/v5idvzh-naomi-wolf-reveals-shocking-details-in-the-pfizer-papers-del-bigtree-oct-10.html?mref=1bxo9j&mc=69gy3

It crossed every membrane in the body, including the blood-brain barrier, and accumulated in the liver, adrenals, spleen, brain and ovaries in women.