#health #vaccine #science
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Vaccines train your body to recognise and fight off infections which may be caused by viruses, bacteria or parasites. They are a preventative medicine that protects you from infectious diseases by helping your immune system to prepare its defences before an infection strikes. In most cases, this means we are either completely protected from the disease or don’t fall seriously ill when we do catch the infection. Each vaccine is designed to target a particular microbe (virus, bacteria or parasite). using a weakened version of it, a dead or inactive version of it or fragments of it that your immune system can recognise. By completely blocking or reducing the amount of infection in your system and the time it is there for, most vaccines also reduce the risk of passing on the illness to other people you are spending time with, including friends and family.
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