This was published about 4 1/2 years ago, but now that parents (and medical professionals that give these injections?) are likely to question all vaccine products it might get some deserved attention.
https://pubmed.ncbi.nlm.nih.gov/29751176/
Apologies for lack of red text.
IL-4 mediates the delayed neurobehavioral impairments induced by neonatal hepatitis B vaccination that involves the down-regulation of the IL-4 receptor in the hippocampus