Vaccination

• What can vaccination prevent in an individual?

  Illness
• What can vaccination prevent in a population?

  The spread of pathogens
• What role do white blood cells play in the immune system?

  They produce antibodies against pathogens
• How do antibodies function against pathogens?

  They stick to pathogens and trigger destruction
• What is introduced into the body during vaccination?

  Dead or inactive forms of pathogens
• Why can't dead or inactive pathogens cause disease?

  They are not capable of causing illness
• What happens to white blood cells after vaccination?

  They produce antibodies and divide by mitosis
• How long can copies of white blood cells remain in the blood?

  For decades
• What happens if the same pathogen enters the body years later?

  White blood cells produce antibodies quickly
• How do vaccines protect against infection?

  They stimulate antibody production against pathogens
• What does the graph in the video illustrate about antibodies?

  Antibody levels rise quickly after pathogen invasion
• Why is it important for a large number of people to be vaccinated?

  To protect unvaccinated individuals through herd immunity
• What is herd immunity?

  Protection of unvaccinated individuals by vaccinated ones
• Who might not get vaccinated?

  Newcomers or those who missed appointments
• What happens to unvaccinated individuals in a vaccinated population?

  They cannot catch the disease if surrounded by vaccinated people
• Where can students find more questions on vaccination?

  In the vision workbook
• How does vaccination work to prevent illness?

  • Introduces dead/inactive pathogens
  • Stimulates white blood cells to produce antibodies
  • White blood cells divide and create memory cells
  • Quick antibody response upon re-exposure to the pathogen
• What are the implications of herd immunity in a population?

  • Protects unvaccinated individuals
  • Reduces disease spread
  • Requires high vaccination rates
  • Benefits community health overall