Despite the name, metaphyiscs isn't phyiscs. But perhaps what you're looking for is what's called the philosophy of science. You'll get a feeling for this if you study the early history of science. I recommend the recorded lectures of Dr. Lawrence Principe, produced by The Teaching Company. I have not yet started his series on the History of Science, but his set on Science and Religion was superb.
Autoimmune diseases or autoimmune disorders.
Autoimmune Disorder
it is antgens.
antibodies
B lymphocytes.
specific immunity
Lymphocyte
B Cells mature in bone marrow and produce antibodies
antibodies
B Cells
lymphocytes
B-cells
Antibodies
Vaccinations produces antibodies and antibodies are those in the immune system to fight off bacteria storied within a human's body.