B. cholesterol is a steroid
Schizophrenia is diagnosed by the presence of symptoms or their precursors for a period of six months. Two or more symptoms, such as hallucinations, delusions, disorganized speech, and grossly disorganized or catatonic behavior, must be significant and last for at least one month.
The answer is not parasites, or pathogens. These are tested for before the donor and recipient are even matched
The antibody screen will test for antigens. So I believe the answer is Antibodies.
