The human intestine is home to trillions of microscopic organisms, including hundreds of species of bacteria. In most people, these bacteria co-exist peacefully and contribute to a mutually beneficial ...

Researchers discovered a previously unknown mechanism that may drive tissue damage and a new target for drug discovery. Our immune system is armed with an array of defenses designed to detect and ...

Our immune system is armed with an array of defenses designed to detect and eliminate harmful threats. One of its most powerful defense mechanisms is the complement system—a group of proteins that ...