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What is the difference between Vaccine and Antibody?

Vaccine Vs Antibody: Vaccines are considered to be among the greatest medical advances in the past several centuries.

By Ground Report
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Difference between Vaccine and Antibody

Ground Report | News Desk

Vaccines are considered to be among the greatest medical advances in the past several centuries. Study of the immune system has led to the development of antibody drugs, allowing medical researchers to harness the mechanisms that make vaccines so powerful in a specific, targeted manner. In this way, the new class of drugs can take advantage of your body’s own ability to target and fight threats.

What's in a vaccine?

Each vaccine contains a killed or weakened form of the organism (usually a virus or bacterium) that causes a particular disease. Even though the organism in the vaccine has been altered so that it won’t make you ill, the part of the organism that stimulates your immune system to respond (the antigen) is still present.


  • Vaccines let your body do the hard work and develop specialized antibodies to fight infections for itself.
  • Vaccines work by utilizing your body’s immune system, which has the innate ability to respond to new threats.
  • Vaccines are products that protect people against many diseases that can be very dangerous and even deadly.

What is an Antibody?

An antibody is a protein produced by the immune system that is capable of binding with high specificity to an antigen. These antigens are typically other proteins, but may be carbohydrates, small molecules or even nucleotides.

Antibodies are powerful research tools because they bind specifically to a unique epitope on the antigen, thereby allowing the detection of a specific protein in an assay while avoiding detection of unrelated proteins.

The antibody itself is a Y-shaped protein that contains a constant region common to all antibodies produced by a particular species and a variable region that is unique and specific to a particular epitope.


  • Antibody drugs are powerful tools of modern medicine, capable of specifically binding and disabling all sorts of targets, but they are complicated and expensive to develop.
  • Each antibody can bind to only one specific enemy substance. Some destroy it directly; others make it easier for white blood cells to destroy the pathogen, according to the National Cancer Institute.
  • The unique feature of antibodies produced in response to an antigen is that they are synthesized in such a way that they are highly specific for that antigen. Thus, they can chemically interact and bind only with that particular antigen, neutralize it, and/or aid in its destruction and removal from the body.

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