Your complement system consists of a group of important proteins in your bloodstream. These proteins help your immune system fight off harmful invaders, such as bacteria, and other foreign substances.

The complement system is part of the body's immune system to fight pathogens and remove cell debris; its role in two autoimmune diseases and a mental disorder is a surprise Variants in a gene of the ...

Researchers identified several antibodies to the nucleocapsid protein from a convalescent COVID-19 patient. Tests found some can inhibit complement hyperactivation and could potentially lead to new ...