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.
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Answer:
C is the correct answer
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