Question

how do vaccines work in our body

Answer 1

Vaccines are like a training course for the immune system. They prepare the body to fight disease without exposing it to disease symptoms.
When foreign invaders such as bacteria or viruses enter the body, immune cells called lymphocytes respond by producing antibodies, which are protein molecules and help fighting against them.

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Answer 2

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Vaccine➫ A substance containing a harmless form of the germs that cause a particular disease.

Ex:- SmallPox

Vaccination➫ Antigenic material to stimulate an individual's immune system to develop adaptive immunity to a pathogen.

♦ It can prevent or ameliorate infectious disease.

♦ It is a biological preparation that improves immunity to a particular disease.

♦ The acellular vaccine uses selected antigens of the pertussis pathogen to induce immunity.

➧ Types 0f Vaccines are:-
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❱ Live-attenuated vaccines

❱ Inactivated vaccines

❱ Toxoid vaccines

❱ Subunit, Recombinant, Polysaccharide & Conjugate vaccines.

➧ Benefits 0f Vaccines are:-
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❱ It helps to prevent disabilities like - blindness & paralysis.

❱ It protects children from serious illness & complications of vaccines preventable diseases.

❱ They prevent diseases that can be dangerous or even deadly.

❱ They prepare the body to fight disease without exposing it to disease symptoms. 

➧ How does Vaccines works:-
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A vaccine works by training the immune system to recognize & combat pathogens - viruses or bacteria.

To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response.

These molecules are called antigens

➧ The most common and serious vaccine preventable disease tracked by the World Health Organization are:-
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❱ Diphtheria
❱ Measles
❱ Mumps
❱ Rubella
❱ Tetanus
❱ Hepatitis B
❱ Mertussis
❱ Meningitis
❱ Tuberculosis
❱ Yellow Fever
❱ Poliomyelitis

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