Category: Human Health & Diseases

Immunity is the protection against diseases provided by the body‘s immune or defence system. There are two parts

Originate from the stem cells in the bone marrow Stem cells retain the ability to divide by mitosis

Active immunity result of infection/naturally/artificially/vaccination body manufactures its own antibodies stimulated by memory cells most effective/rapid response (second

Allergy means ‗altered reaction‘ – it is the inappropriate and harmful response of the body‘s defence mechanisms to

the term antibiotic strictly refers to substances that are of biological origin whereas the term chemotherapeutic agent refers

ACQUIRED IMMUNODEFICIENCY SYNDROME (AIDS) caused by HIV; the virus infects and destroys cells of the body‘s immune system

Causes of TB TB is caused by two bacteria; Mycobacteria tuberculosis and Mycobacteria bovis. Tuberculosis is ultimately caused

malaria is caused by a single celled organism called the organism is transmitted from one person to another

Why infectious diseases are the leading causes of death in developing countries infectious disease are communicable/transmittable; pathogens spread