The immune system is the body’s internal defense force, designed to protect us from germs like bacteria and viruses.

What is Autoimmunity?

Autoimmunity occurs when the immune system loses its ability to distinguish between 'self' and 'non-self.' Normally, immune cells recognize the body's own tissues as safe. In an autoimmune condition, the body mistakenly identifies healthy cells as foreign invaders. This leads the immune system to launch an attack against its own organs, tissues, or cells, causing inflammation and damage.

How the Immune System Makes Mistakes

Our immune system uses special proteins called antibodies to find and neutralize threats. Sometimes, the immune system gets confused due to a mix of genetics and environmental factors. It begins creating 'autoantibodies'—antibodies that target your own body parts instead of germs. This process turns the body's natural defense mechanism into an internal threat.

Real-World Examples of Autoimmune Diseases

Different diseases occur depending on which part of the body the immune system decides to attack:

• Type 1 Diabetes: The immune system attacks the pancreas, destroying cells that produce insulin, which helps control blood sugar.
• Rheumatoid Arthritis: The immune system attacks the lining of the joints, causing painful swelling and stiffness.
• Multiple Sclerosis: The immune system damages the protective covering of nerve fibers, making it hard for the brain to send signals to the body.
• Vitiligo: The immune system destroys cells that give skin its color, resulting in white patches.

Key Facts About Autoimmunity

Scientists are still studying why the immune system fails. What we know for sure is that these conditions are not contagious; you cannot catch them from someone else. They often run in families, suggesting that DNA plays a large role in who develops these issues. While there is no simple cure for many autoimmune diseases, doctors use medications to calm the immune system, helping to manage symptoms and prevent further damage to the body.