inoculate

in|ocu|late /ɪn'ɒkjʊleɪt/ (inoculates inoculating inoculated)
[VERB] V n, be V-ed against n
To inoculate a person or animal means to inject a weak form of a disease into their body as a way of protecting them against the disease.
...a program to inoculate every child in the state...
His dogs were inoculated against rabies.
= vaccinate
● inoculation [N-VAR] oft N against n
This may eventually lead to routine inoculation of children...