Question
How does vaccination prevent diseases ?
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Answer
A vaccine is a small amount of the disease causing microorganisms that have been weakened or killed so that they will not cause the disease. A vaccine can be injected or taken orally. Injecting or swallowing a vaccine is called vaccination Vaccination is a way of preventing pathogenic microorganisms from causing a disease. It works by making the body’s immune system produce antibodies against the disease causing microbes present in the vaccine.
The antibodies attack and destroy the weakened microbes as they enter the body. These antibodies remain in the blood to fight off an attack by that particular microorganism in future. Thus, the body develops immunity to the particular disease.
Vaccine are given against diphtheria, whooping cough, tetanus, polio, measles and tuberculosis to children between the ages of $6$ weeks to $6$ years. Few of these vaccinations have to be repeated after a few years, as they do not give immunity for life.
The antibodies attack and destroy the weakened microbes as they enter the body. These antibodies remain in the blood to fight off an attack by that particular microorganism in future. Thus, the body develops immunity to the particular disease.
Vaccine are given against diphtheria, whooping cough, tetanus, polio, measles and tuberculosis to children between the ages of $6$ weeks to $6$ years. Few of these vaccinations have to be repeated after a few years, as they do not give immunity for life.
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