Elevated blood histamine caused by vaccinations and Vitamin C deficiency may mimic the shaken baby syndrome.

“The findings of subdural hematoma and retinal hemorrhages in infants, without any documented history of major trauma, do not always indicate child abuse. A combination of ascorbate depletion and the injection of foreign proteins can cause a very high blood histamine level, leading to capillary fragility and venular bleeding. This can be prevented by the administration of vitamin C.”

See more at ncbi.nlm.nih.gov