There are two reasons why: 1) It changes the DNA and 2) It affects the immune system.
immune system
The Immune System is the defense network of the body. The immune system works with specific receptors on specialized cells - detecting foreign bodies and signaling for the immune system to destroy them.
the toxins destroy you lungs and immune system.
the toxins destroy you lungs and immune system.
Yes, your immune system is a "team" of white blood cells that swallow other opposing cells or bacteria, and then destroy them. This process may destroy the blood cell.
Yes because your immune system can fight and destroy it. Not all viruses can be destroyed. (HIV and AIDs for example)
antibodies
Antibody
Antibody
Antibody
Antibody
The immune system needs to destroy the pathogens. Other wise the pathogens will multiply in the body of host. The pathogens will multiply by geometrical proportion. With in very short time the pathogens will occupy the whole body. You can no longer survive in that case.