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Advantages And Disadvantages Of Vaccine

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Immunisation is the process of making a person immune to a type of infection, generally by vaccines. “Live attenuated vaccines are created using viruses or bacteria that has been weakened before being included in the vaccine” . Once the vaccine is injected into the body the weakened viruses or bacteria will begin to grow. This causes a response from the immune system. The weakened dose of the bacteria or virus do not usually cause disease, however if given to a person with a weakened r impaired immune system, there is potential for uncontrolled growth resulting in disease as the immune system cannot get on top of the weakened disease. “The second type of vaccine is inactivated vaccines which are made using viruses or bacteria that has been inactivated” , therefore they will not cause disease, or the vaccines are made using a toxin protein derived from the viruses or bacteria. Therefore nothing in an inactivated vaccine is alive. This means that after the vaccination, the bacteria or virus cannot grow, therefore there is no chance of disease. Inactivated vaccines usually require more than one vaccine for it to be fully effective, or ‘boosts’ and example of these would be influenza, polio, and tetanus.
“The bacteria that can create disease is called a pathogen, each pathogen has distinguishing components, and these are known as antigens” . Antigens are what allows the body’s immune system to tell the difference between the body itself and foreign material. If it is the

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