미해결 질문
Compared with non-replicating mRNA vaccines, a smaller dose of self-amplifying RNA is needed to induce a protective immune response. What are possible advantages of being able to use a smaller dose of a vaccine during a pandemic?
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41. Immune System
Adaptive Immunity
Multiple Choice
Which of the following is an example of passive immunity?
A
Development of memory B cells following exposure to a pathogen
B
Transfer of antibodies from mother to infant through breast milk
C
Activation of T cells after infection
D
Production of antibodies after vaccination
검증된 단계별 안내1
Understand the concept of passive immunity: Passive immunity occurs when antibodies are transferred from one individual to another, providing immediate but temporary protection. This is different from active immunity, where the body produces its own antibodies in response to exposure to a pathogen or vaccine.
Analyze the first option: 'Development of memory B cells following exposure to a pathogen' refers to active immunity because the body is actively producing memory cells and antibodies in response to the pathogen.
Analyze the second option: 'Transfer of antibodies from mother to infant through breast milk' is an example of passive immunity because the infant receives pre-made antibodies from the mother without producing them itself.
Analyze the third option: 'Activation of T cells after infection' refers to active immunity because the body is actively responding to the infection by activating its own immune cells.
Analyze the fourth option: 'Production of antibodies after vaccination' refers to active immunity because the body is stimulated to produce its own antibodies in response to the vaccine.
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