Order the steps for vaccination. Pathogens enter the body and the body can remember the pathogen using memory cells, destroying the pathogen. A weakened or dead form of the pathogen is injected into t

Order the steps for vaccination. Pathogens enter the body and the body can remember the pathogen using memory cells, destroying the pathogen. A weakened or dead form of the pathogen is injected into the body. White blood cells produce antibodies that destroy the pathogen. The pathogen is not strong enough to cause disease but its presence in the body signals the body to protect itself against the pathogen.