Fun fact: Wakefield wasn't trying to discredit all vaccines, just the MMR jab.
Fun fact: Wakefield owns the patent to an alternative vaccine to the MMR jab.
A vaccine is an extremely weak strain of a bacterium/virus. It won't harm you. Your body reacts against the foreign particles by producing antibodies to destroy it. After it is destroyed, memory cells will be able to produce the same antibodies as soon as the same pathogen comes into contact with your body so you won't get sick.
Fun fact: Wakefield owns the patent to an alternative vaccine to the MMR jab.