In type 1 diabetes, the human body turns on itself. The immune systems of people with type 1 diabetes start attacking insulin-producing beta cells, as though they were the bacteria and viruses the immune system is supposed to fight off.

Researchers at Joslin Diabetes Center are puzzling out what causes the immune system to turn on what it's meant to protect. The lab of Tom Serwold, Ph.D. studies why T cells, the immune system warriors, mistake beta cells for the enemy.

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