5.Why do we fall ill (9)

This is the correct option. Congenital disorder or congenital disease is a condition existing at birth and often before birth, regardless of causation. Of these diseases, those characterised by structural deformities are termed "congenital anomalies" and involve defects in or damage to a developing foetus.

African sleeping sickness or Trypanosomiasis is spread through tsetse fly.

The term ‘antibiotic’ was coined by Selman Waksman.

Tuberculosis, MTB or TB (short for Tubercle bacillus), in the past also called Phthisis pulmonalis or consumption, is a widespread, and in many cases fatal, infectious disease caused by various strains of mycobacteria, usually Mycobacterium tuberculosis. Tuberculosis generally affects the lungs.

Active immunity results when exposure to a diseased organism triggers the immune system to produce antibodies to that disease. Exposure to the diseased organism can occur through infection with the actual disease (resulting in natural immunity) or introduction of a killed or weakened form of the diseased organism through vaccination (vaccine-induced immunity).

DPT is a combination of vaccines used against three infectious diseases - diphtheria, whooping cough and tetanus.

Rheumatoid arthritis is an autoimmune disease that can cause chronic inflammation of the joints and other areas of the body.

Hepatitis and AIDS can spread through blood transfusion.

Rabies is a viral disease that causes acute inflammation of the brain in humans and other warm-blooded animals. Early symptoms can include fever and tingling at the site of exposure. These symptoms are followed by one or more of the following symptoms: violent movements, uncontrolled excitement, fear of water (hydrophobia), an inability to move parts of the body, confusion and loss of consciousness.

B.C.G. is Bacillus Calmette–Guérin. It is a vaccine against tuberculosis.

Vaccines cannot be administered against all infectious diseases.                 

Passive immunity is a type of artificial immunity in which antibodies are administered.

Lymphocytes are white blood cells which provide immunity.

Biological fact.

Biological fact

Polio is a contagious viral illness.

fact

fact

HIV- Human immuno deficiency virus.

fact