The B cell has to determine if this molecule is “self” or “not self,” because you don’t want to make antibodies to yourself. (When that happens a serious illness results). All cells of your body have a distinctive marker, called MHC II; the antigen from the vaccine does not have...
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the problem also moved to my left wrist and ankle. The doctors finally gave me a diagnosis of juvenile rheumatoid arthritis (mainly because they didn’t want to say “We don’t have a clue.”). I was told I would most likely improve as I entered adulthood, but there was a chance tha...