PART A: Which statement best expresses the central idea of the text?
A
Vaccines can be a dangerous way to protect the body from diseases, as you have to initially expose the body to disease.
B
Vaccines are not necessary to protect against diseases, as the body will automatically remember certain diseases and protect against them.
C
The immune system struggles to remember viruses that it has experienced and needs the help of vaccines to make memories of them.
D
A vaccine is developed by familiarizing your body with a pathogen so that it can recognize it and keep it from spreading within you and to others.
Answers
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A vaccine is developed by familiarizing your body with a pathogen so that it can recognize it and keep it from spreading within you and to others.
Step by step explanation:
- A vaccine is a preparation that give active acquired immunity to a infectious disease. Vaccine contains a antigen that is resembling a disease causing organism. The antigen obtained can be from live, killed microorganisms or toxins or surface proteins. When the organism re enters the body, it recognises it by it's memory and kills the pathogen.
- There are two types of immunity: Acquired immunity and passive immunity.
- There are two types of acquired immunity: naturally acquired active immunity and artificially acquired active immunity.
- Vaccines come under artificially acquired active immunity
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