Immunity and vaccination Quiz
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5 questions, one answer each
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1. A vaccinated person has been given which type of immunity?
- A. Natural active
- B. Artificial active
- C. Natural passive
- D. Artificial passive
2. Why does a baby protected by antibodies from breast milk not have long-term immunity?
- A. The baby makes no memory cells
- B. The antibodies are changed into antigens
- C. The baby's B cells destroy the antibodies
- D. Breast milk contains memory cells that die
3. Which injection gives artificial passive immunity?
- A. A weakened virus
- B. A killed bacterium
- C. Purified antigens
- D. Ready-made antibodies against tetanus
4. What is the main purpose of herd immunity?
- A. To make every person immune
- B. To protect unvaccinated people by limiting spread of the pathogen
- C. To remove the pathogen permanently from all hosts
- D. To make booster doses unnecessary
5. Uptake of a vaccine for a highly infectious disease falls from 97% to 85%. What is the most likely result?
- A. No change because most people are immune
- B. The disease is eradicated
- C. The chain of transmission is no longer broken, so outbreaks can occur
- D. Memory cells in vaccinated people stop working