Because if they didn't we would all be dead.
The "immune system" produces chemicals (or "antibodies") which help the body to fight infections. When a body part becomes inflamed, these chemicals are attracted to the area in an attempt to destroy any bacteria.
They fight bacterial infections.
antibodies fight infections
Blood cells white to fight infections and red Im not sure..?
Aids attacks blood cells which fight infections, which weakens the immune system
tea helps fight off infections as well as gut bacteriatea helps fight off infections as well as gut bacteria
They fight infections
They Kill Bacteria
Antibiotics
Antibiotics are used to fight bacterial infections not viral infections.
anti-bodies
Infections.