Discovered: A “brain-body circuit” that turns inflammation up and down

“Some scientists refer to the immune system as the seventh sense,” says Dr. Hao Jin, a neuroimmunologist at the National Institute of Allergy and Infectious Diseases (NIAID). It’s a comparison that anyone who’s ever had a common cold can appreciate. Much like our traditional senses help us perceive and interact with our external world, our immune system — a complex network of cells, tissues, and organs — helps us sense and respond to threats in our internal environment. And, as we all know, it’s not always a pleasant experience. When bacteria or viruses invade our body, our immune system springs into action, releasing pro-inflammatory molecu......

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