Question

Many people have received the measles vaccine, which can prevent this very serious or even fatal disease. How does receiving a measles vaccine help to protect a person from getting the measles?

The vaccine causes the immune system to produce antibodies to the virus that causes the measles.
The vaccine adds a chemical to the body that is poisonous to the virus that causes the measles.
The vaccine inserts genes into body cells to fight the virus that causes the measles. The vaccine prevents the virus that causes the measles from entering the body.​

Answer 1

A vaccine is a weaker version of the virus therefore when you body creates the right antibodies it can kill it. Effectively it is used so when you do catch it the secondary response would be faster because they have the right antibodies already, memory b-lymphocyte hold the it and phagacytes absorbing it~ killing it

So it is the vaccine prevents the vius that causes the measles from entering the body