Complement component 3, often called C3, is an essential protein of the immune system. This protein plays a vital role in the body’s innate immune system, providing: the first line of defense against ...

Faults in a certain part of the immune system might be at the root of some long covid cases, new research suggests. For many people, covid is an illness that blusters in and out of our lives as cases ...

St. Louis, August 20, 2002 -- Herpes viruses enter the body and hide away in cells, often re-emerging later to cause illnesses such as shingles, genital herpes and cancer. How these viruses evade the ...