HOW DOES YOUR IMMUNE SYSTEM WORK?
Your immune system works because your body is able to recognize "self" and "non-self." This means that your body is able to tell if an invader (virus, bacteria, parasite, or other another person's tissues) has entered it—even if you aren't consciously aware that anything has happened. Your body recognizes this invader and uses a number of different tactics to destroy it.
THE IMMUNE SYSTEM IN ACTION
Your immune system has many different ways of fighting off foreign invaders. When confronted with a virus, your body responds by activating specific processes of the immune system. First your body recognizes a foreign antigen and delivers it to the lymph system, where it is ingested by a macrophage.
Then the macrophage processes the virus and displays the antigens for that particular virus on its own exterior. This antigen then signals a helper T- cell.
Next the T-cell reads this signal and sounds the alarm for other parts of your immune system to respond.
The B-cell responds to this call and comes to read the antigen from the surface of the macrophage.
