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Antibody stimulation by antigen negative blood?
BldBnker reacted to Neil Blumberg for a topic
Probably the primary stimulation was not the fetus, but previous pregnancy, transfusion, tattooing, needle sharing, non-sterile tattooing, etc. Pregnancy is a situation in which B cells are upregulated (type 2 immunity) and T cells down regulated (roughly speaking) and pregnancy may have increased B cell activity to the point where previously undetectable antibodies are now detectable. Just a theory ;).1 point