Full details on what is vaccines and how it works.
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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.
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Vaccines contain a microorganism in a weakened or killed state (inactive form), or proteins or toxins from the organism.
They prepare the body to fight against disease without exposing it to disease symptoms.
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