A vaccine is effective because ________. the vaccine contains the lymphocytes necessary to fight infection the vaccine contains the antibodies necessary to fight infection the secondary response of the adaptive immunity is faster and more efficient than the primary response lymphocytes are unable to mount an immune response the first time they are exposed to a new pathogen
Added by -Ngeles F.
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Step 1: The primary immune response occurs when the immune system first encounters a new pathogen or antigen. Show more…
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An effective vaccine helps a person make a strong: nonspecific response innate immune response secondary response upon natural exposure to the pathogen primary response upon natural exposure to the pathogen
Marlyn J.
1. A vaccination is an example of (passive/active) immunity 2. A vaccination is an example of (natural/artificial) immunity 3. True/False: Memory cells are produced during passive immunity. 4. Explain herd immunity 5. An effective vaccine will cause a strong: A. primary response upon exposure to the pathogen B. secondary response upon exposure to the pathogen C. nonspecific response D. none of the above 6. What is more important when determining a vaccines efficacy? A. Production of memory cells B. Immediate production of antibodies 7. Which of the following generally elicits a stronger immune response? A. Attenuated vaccine B. Inactivated vaccine 8. A living microbe with reduced virulence that is used for vaccination is considered A. a toxoid B. virulent C. dormant D. attenuated 9. True/False: The measles vaccine is considered an effective attenuated vaccine. 10. Who should NOT be given attenuated vaccines?
Adi S.
In order for a vaccine to be effective, it should reduce a person's chance of acquiring a disease. Consider a hypothetical vaccine for malaria-a tropical disease that kills between 1.5 and 2.7 million people every year. $^{20}$ Suppose the vaccine is tested with 500 volunteers in a village who are malaria free at the beginning of the trial. Two hundred of the volunteers will get the experimental vaccine and the rest will not be vaccinated. Suppose that the chance of contracting malaria is $10 \%$ for those who are not vaccinated. Construct a two-way table to show the results of the experiment if: (a) The vaccine has no effect. (b) The vaccine cuts the risk of contracting malaria in half.
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