Which best description how a vaccine works?

Answer 1

Example of how a vaccine works:

Suppose you are going to fight with some people about whom you know nothing, like how strong they are, what kind of weapons they have, what is their usual mode of action, etc. Once you have an initial skirmish with their advance troops, you may feel some loss, but then you will also be aware of their strategies so that, if there is a next time they will try to attack you, it will not be as easy for them. Before they invade you next, you will be well prepared with your own advance system of security, defense and targeted weapons ready to protect yourself from their specific attacks. This is how the vaccination triggers your body to have an immune response...the easily beaten small advance troop represents the vaccine and the skirmish is the immune response/battle.

In this similar way, a vaccination generates a skirmish between your body and a weak form of the microbe, which can not make you sick with the disease, but which can make your body's immune system aware of the type of infection and cells that microbial antigen can make, and the mode of action of its attack. As a result of that analysis of the enemy, your body will produce some cells known as immune cells (antibodies) which can act as the soldiers in the example that have been armed and properly supplied for future attacks by that enemy and stand ready for a potential next battle with those microbes.

For most attacks, your body will always have those same weapons in the arsenal, so that if those specific invaders return in your lifetime, you will still be ready with the stored antibodies.

See the related question below for an explanation of the active artificially-acquired immunity process (immunity through vaccination),

"How do vaccines work?".

Answer 2

the vaccine makes the body create memory cells

Answer 3

The vaccine makes the body create memory cells for Apex