VACCINES + DRUGS

• Vaccine

  Exposes the body to weakened or inactivated pathogens, allowing the immune system to develop immunity without causing the full disease
• Vaccines

  • Contain weakened or inactivated pathogens
  • Pathogens still contain the same antigens
  • Body responds by producing antibodies and developing immunity
• Diseases vaccines can work against

  • Bacteria
  • Viruses
• Pros of vaccines

  • Protect us from catching horrible diseases
  • Help control diseases that used to be common like polio, smallpox, measles, and whooping cough
  • Prevent big outbreaks of disease (epidemics)
• Cons of vaccines


  • Vaccines don't always grant full immunity
  • Can cause bad reactions like swelling, fevers, or seizures (though these are rare)