VACCINATING
inoculating, vaccinating
(noun) the act of protecting against disease by introducing a vaccine into the body to induce immunity; “doctors examined the recruits but nurses did the inoculating”
Source: WordNet® 3.1
Verb
vaccinating
present participle of vaccinate
Source: Wiktionary
VACCINATE
Vac"ci*nate, v. t. [imp. & p. p. Vaccinated; p. pr. & vb. n.
Vaccinating.] Etym: [See Vaccine.]
Definition: To inoculate with the cowpox by means of a virus, called
vaccine, taken either directly or indirectly from cows.
Source: Webster’s Unabridged Dictionary 1913 Edition