The word complement comes from the Latin complementum, meaning “something that fills up or completes,” derived from complere, ...

The complement system is a critical modulator of immune responses that triages microbial and other threats through pattern recognition, tailored effector functions, and intensive crosstalk with other ...

However, the discovery that receptors for complement activation fragments are expressed by almost all immune cells — including B cells and T cells — and that these cells can sense and convert the ...