Definition of Vaccines
Vaccination is defined as the application of a specific agent designed to stimulate a body’s immune system to develop protection against the disease.
It is a process where the body’s immune system is hardened against infections by first introducing it to a weaken or dead form of the disease.
How vaccines work?
When we inject the weakened or dead form of the virus into the body, the virus will circulate through the body and be exposed to the b lymphocytes cells (the body’s defense system) the cells will then produce antibodies which will help to fight off a real infection.
When antibodies are introduced into the body, they will fight off the viruses that the body is exposed to in real life situations and prevent the vaccinated body from becoming ill from the infection.
By : Dr Chen Yiming
Family Physician, MBBS (Singapore), GDFM (NUS), GDFP Dermatology (NUS)