Vaccines

• What is passive immunity?

  Immunity from external antibodies
• What is active immunity?

  Immunity from the individual's immune system
• What is vaccination intended to stimulate?

  Active immunity
• What are the features of a successful vaccination program?

  • Economically available vaccines
  • Few unpleasant side effects
  • Means for production and storage
  • Timely administration
  • Vaccination of the majority of vulnerable population
• Why might vaccination not eliminate a disease?

  Some individuals may not develop immunity
• What can happen immediately after vaccination?

  Individuals may develop the disease
• What is antigenic variability's effect on vaccination?

  Pathogen antigens may change rapidly
• What challenges exist in controlling cholera and tuberculosis through vaccination?

  Pathogens can change rapidly and hide
• How does the elderly population affect vaccination effectiveness?

  They have less effective immune systems
• What is a vaccine

  Weakened or dead pathogens injected into a person to create a small immune response to make MEMORY cells