Questions: Vaccines usually contain particles that are pieces of the virus or bacteria they target. How do you think this helps you avoid getting sick in the future? The particles act as antigens, against which your immune system develops antibodies. The particles are engulfed by your cells, which make new viruses recognized by your immune system. These kinds of vaccines are not effective because they only contain pieces of the pathogens.

Vaccines usually contain particles that are pieces of the virus or bacteria they target. How do you think this helps you avoid getting sick in the future?
The particles act as antigens, against which your immune system develops antibodies.
The particles are engulfed by your cells, which make new viruses recognized by your immune system.
These kinds of vaccines are not effective because they only contain pieces of the pathogens.
Transcript text: Click First Exposure and Subsequent Exposure to the right to learn about the acquired immune response. Q1.10. Vaccines usually contain particles that are pieces of the virus or bacteria they target. How do you think this helps you avoid getting sick in the future? The particles act as antigens, against which your immune system develops antibodies. The particles are engulfed by your cells, which make new viruses recognized by your immune system. These kinds of vaccines are not effective because they only contain pieces of the pathogens. Check Answer $8 / 11$
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Solution

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The answer is the first one: The particles act as antigens, against which your immune system develops antibodies.

Explanation for each option:

  1. The particles act as antigens, against which your immune system develops antibodies.

    • Correct: This is the fundamental principle behind how vaccines work. The particles in the vaccine serve as antigens, which are recognized by the immune system. This triggers an immune response, leading to the production of antibodies. These antibodies will recognize and fight the actual virus or bacteria if the body is exposed to it in the future, thereby preventing illness.
  2. The particles are engulfed by your cells, which make new viruses recognized by your immune system.

    • Incorrect: This statement is misleading. While cells can engulf particles, they do not produce new viruses. Instead, the immune system recognizes the antigens presented by these particles and mounts a defense against them. The production of new viruses is not a part of the vaccine's mechanism.
  3. These kinds of vaccines are not effective because they only contain pieces of the pathogens.

    • Incorrect: This statement is false. Vaccines that contain pieces of pathogens (such as protein subunits or inactivated toxins) are indeed effective. They are designed to safely expose the immune system to key antigens without causing disease, thereby providing immunity.

Summary: Vaccines help you avoid getting sick in the future by introducing antigens (pieces of the virus or bacteria) to your immune system, which then develops antibodies against these antigens. This prepares your immune system to recognize and combat the actual pathogen if you are exposed to it later.

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