If during the dream you are the one who receives the vaccine, then it is an indication of attention of those around you, as well as favors and benefits that should be received in the short term.
Dream dictionary: vaccine dream meanings
Applied vaccine means remedy for ills, disease cured.
If we are the doctor this dream warns us that we must attend to both the body and the soul. The medicine symbolizes support for the body and soul. If the medicine is for someone else then it’s that person who requires our help….