What is the Immune System?
The immune system is the body’s natural defence mechanism that protects against infections, diseases and harmful invaders like bacteria, viruses, and toxins. It consists of a complex network of cells, tissues, and organs.
Why is the Immune System Important?
Fights Infections – Helps destroy harmful bacteria, germs, viruses before they cause illness.
Heals the Body – Supports recovery from injuries and infections.
Recognizes and Destroys Abnormal Cells – Helps detect and eliminate cancerous or malfunctioning cells.
Adapts to Threats – Develops immunity to previously encountered pathogens (e.g., vaccines train the immune system).
Balances Inflammation – Prevents excessive immune responses that could damage the body (e.g., autoimmune diseases).
Interesting Immune System Statistics
70%–80% of immune cells are located in the gut, making gut health crucial for immunity.
The human body produces 1 billion white blood cells per day to maintain immunity.
Chronic stress can suppress immunity by up to 40%, making relaxation and sleep essential.
Regular exercise reduces illness risk by 50%, while too much intense exercise can temporarily weaken immunity.
A person can produce up to 10 million different antibodies to fight off various infections.
Immune deficiency
An immune system deficiency occurs when the immune system is weakened or not functioning properly, making the body more vulnerable to infections, diseases, and other health problems.
Causes of Immune System Deficiency
Genetic Disorders – Some people are born with weak immune systems due to inherited conditions.
Chronic Diseases – Conditions like diabetes, cancer, and autoimmune diseases can weaken immunity.
Malnutrition – Deficiencies in vitamins like A, C, D, and zinc can impair immune function.
Chronic Stress – Long-term stress increases cortisol, which suppresses immune activity.
Lack of Sleep – Sleep deprivation reduces the production of infection-fighting cells.
Excessive Alcohol & Smoking – Weakens immune defences and increases susceptibility to infections.
Certain Medications & Treatments – Chemotherapy, steroids, and immunosuppressants lower immune responses.
Ageing – The immune system naturally weakens with age, making older adults more prone to infections.
Symptoms of Immune deficiency
Constant colds, flu and coughing
Frequent and recurrent pneumonia, bronchitis, sinus infections, ear infections or skin infections
Headaches and foggy brain
Inflammation and infection of internal organs
Hyper-acidity or heartburn
Blood disorders, such as low platelet counts or anaemia
Digestive problems, such as cramping, loss of appetite, nausea and diarrhoea
Delayed growth and development
Autoimmune disorders, such as lupus, rheumatoid arthritis or type 1 diabetes
Recurrent swollen glands, sore throats, aches and pains
Allergies
Fatigue
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