According to the text, what is the main purpose of vaccines?, To find out what causes dangerous diseases., To cure diseases after a person gets sick., To protect the body against dangerous diseases before contact., To encourage global vaccination programmes., Which deadly disease is mentioned as an example of one that no longer exists? , Polio, Smallpox, Flu, Measles, According to the text, what are vaccines made of?, Healthy white blood cells, Real, active, dangerous diseases., Substances that only destroy antibodies., The same micro-organisms that cause the disease., How do vaccines help the body develop immunity?, By imitating a real infection., By creating a painful injection., By preventing the immune system from reacting., What does the immune system produce to attack the substance in the vaccine?, Micro-organisms, Injections, New diseases, Antibodies, What is the immune system's response if the vaccinated body meets the disease in the future?, It will be unable to protect against the infection., It will ask for another vaccine., It will respond immediately., It will forget the disease completely..
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