Vaccine is a inactivated or the part of the virus that can be injected into the body that ultimately leads the immune respones against the virus.
Actually vaccine provides active aquired immunity to the body.The part of the virus may be surface protein or it may be the nucleic acids depending on the type of the vaccine.
How It Is Work
To understand how it is work,first of all we need to understand how our immune system work.When any pathogen enter into the body.Body protects us by different
mechanism.For infection pathogen needs to cross the first and second lines of defence system of our body.So pathogens contain different kind of the protein,glycoprotein,glycolipid and lipids molecule on their coat surface that things can be recognice by
our immune systems and then antibody can be made against their coat surface components.antibody can be made by a special type of white bloods cells that is known as a B-lymphocytes(plasma cells).
In the human body,billons of B-lymphocytes are presents that are resonsible for making billions of different type of the antibody.Each B-lymphocyte is provide a unique type of antibody.when B-lymphocyte recogniges the pathogen it starts to dividing and makes a lots of antibody against that paticular pathogen.
Vaccine is a inactivated virus that contains the surface proteins or any others coat proteins.When it is injected into body.Body starts making antibody against this coat proteins and provide immunity against injected virus and also make memory B cells that provide long term immunity to the body.
So,we have to understand that vaccine provide immunity prior to the infection of that particular virus.
To Know What Is Convalescent Plasma Therapy click on the youtube video
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