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
Basophils are a type of white blood cell that play a role in the body's immune response by releasing chemicals like histamine to help fight off infections and regulate inflammation.
They Kill Bacteria
They fight infections
Examples of natural defenses in living organisms include the immune system, physical barriers like skin and mucous membranes, detoxifying enzymes in the liver, and the ability to generate heat or fevers to fight off infections. In plants, natural defenses can include thorns, toxins, and chemicals that repel pests or pathogens.
Antibiotics are used to fight bacterial infections not viral infections.
Infections.