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Transcript
Vaccines Vaccines • Protect our body from contracting viruses and certain types of bacteria • Allow body to become immune to a specific pathogens – Example: Flu vaccine • Pathogen: disease-causing agents such as viruses or bacteria How does a vaccine work? 1. A doctor injects a person with a dead or weakened version of a pathogen 2. Your cells attack the intruding dead/weakened pathogen and produce antibodies How does a vaccine work? 3. If you are exposed to the real pathogen the antibodies are ready to attack it before it causes sickness • A vaccine is like “practice” so your body can learn to fight the real pathogen Vaccines 1 2
