Part A
The two correct answers regarding how vaccines work are:
- After vaccination, the body's immune system will be able to better recognize and fight off the actual virus should it enter the body.
- Vaccines are made of the same pathogen as the virus itself, although in a weakened form.
Part B
The best justification for choosing these answers is:
Vaccines are made from the weakened virus, which allows the body to recognize the virus when actually infected.