Textbook Question
Which of the following vaccine types is commonly given with an adjuvant?
a. Attenuated vaccine
b. Modified live vaccine
c. Chemically killed vaccine
d. Immunoglobulin
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20. Adaptive Immunity
Review of Adaptive Immunity
2:35 minutesProblem 2
Textbook Question
What are the advantages and disadvantages of attenuated vaccines?
Verified step by step guidance1
Step 1: Understand what an attenuated vaccine is. Attenuated vaccines use live microorganisms that have been weakened so they cannot cause disease in healthy individuals but still provoke an immune response.
Step 2: Identify the advantages of attenuated vaccines. These typically include strong and long-lasting immunity, often with fewer doses, because the vaccine mimics a natural infection closely.
Step 3: Recognize the disadvantages of attenuated vaccines. These can include the risk of causing disease in immunocompromised individuals, potential reversion to a virulent form, and the need for careful storage conditions to maintain vaccine viability.
Step 4: Consider the practical implications of these advantages and disadvantages in vaccine development and public health, such as balancing efficacy with safety and logistical challenges.
Step 5: Summarize by comparing attenuated vaccines to other types, highlighting why their unique properties make them suitable or unsuitable in different contexts.
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2mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Attenuated Vaccines
Attenuated vaccines use live pathogens that have been weakened so they cannot cause disease in healthy individuals. These vaccines mimic natural infection, stimulating a strong and long-lasting immune response by activating both cellular and humoral immunity.
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Advantages of Attenuated Vaccines
The main advantages include strong and durable immunity often after a single dose, activation of multiple arms of the immune system, and the ability to induce herd immunity by reducing pathogen transmission. They often provide lifelong protection without the need for frequent boosters.
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Disadvantages of Attenuated Vaccines
Disadvantages include the risk of reversion to a virulent form, especially in immunocompromised individuals, potential side effects, and the need for careful storage to maintain vaccine viability. They are also contraindicated in certain populations such as pregnant women.
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