What is immunity?

Immunity is the ability of the body to protect itself from harmful microorganisms and diseases. It helps the body recognize and destroy pathogens such as bacteria, viruses, fungi, and other foreign substances.

The immune system plays a major role in maintaining health and preventing infections.

Functions of Immunity

Immunity helps the body:

• Fight infections and diseases

• Identify harmful microorganisms

• Destroy foreign substances

• Prevent repeated infections

How Immunity Works

1. Pathogens enter the body

2. The immune system recognizes them as foreign

3. White blood cells produce antibodies

4. Antibodies attack and destroy the pathogens

5. Memory cells help provide future protection

Components of the Immune System

Important parts of the immune system include:

• White blood cells

• Antibodies

• Lymph nodes

• Bone marrow

• Spleen

Types of Immunity

1. Natural Immunity

Immunity present naturally in the body from birth or developed after recovering from diseases.

2. Acquired Immunity

Immunity developed through:

• Vaccination

• Previous infections

Importance of Immunity

Strong immunity helps:

• Prevent diseases

• Recover faster from infections

• Protect the body from harmful microbes

Weak immunity increases the risk of infections and illnesses.

Ways to Improve Immunity

• Eat a balanced diet

• Exercise regularly

• Get proper sleep

• Maintain hygiene

• Stay vaccinated

• Manage stress

Conclusion

Immunity is essential for survival because it protects the body from disease-causing organisms and helps maintain overall health.