Question

A vaccine put into the body weakened/dead pathogenic material, which by itself is incapable of causing disease. How does it help to protect the body in the case of infection by a live pathogen

Answer 1

familiarity

Explanation: your bodies immune system remebers past aliments in case it faces them again so a vaccine in your body helps your body build up immunity to the ailment before it overwelhms you like a guy took small amounts of black mamba venom until his immune sysste was so used to it he could take a bite and survive unscaved