Inoculation is the act of introducing a vaccine into a person's body. It can be used in other contexts, such as when a culture is inoculated with body fluids (such as from a nasal swab) to test for the presence of a bacterium or virus.

Vaccination is the process of introducing a vaccine into the body to produce immunity to a specific disease. Vaccines are usually administered through needle injections but can also be administered by mouth or sprayed into a nostril.2
Waiting for someone to explain the difference here