S: (v) immunize, immunise, inoculate, vaccinate (perform vaccinations or produce immunity in by inoculation) "We vaccinate against scarlet fever"; "The nurse vaccinated the children in the school"
S: (v) change, alter, modify (cause to change; make different; cause a transformation) "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"