Airborne infectious diseaseTuberculosis (TB) is an airborne infectious disease which is caused by bacteria belonging to Mycobacterium tuberculosis complex1. There are approximately one third of the worlds population are infected with tuberculosis where nine millions of new cases reported annually2. Although tuberculosis is essentially curable and preventable, it continues to cause millions of deaths every year2. When infected individual coughs, sneezes or spits, M. tuberculosis is propelled into the air and infected those who breathed in the bacteria that existed in droplets of saliva3. Primarily, tuberculosis will affect the lungs, known as pulmonary tuberculosis3. It will also affect other parts of body, for instance lymph nodes, bones, brain and kidneys3. Once a person is infected with tuberculosis, there are basically three possible ways may occur. Firstly, the immune system plays a vital role and strong enough to kill the bacteria3. Secondly, immune system is not strong enough to fight off the bacteria but is able to build a defensive barrier against the bacteria3.
