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.