IPA: //vækɪˈniː//
KK: /vækəˈni/
A person who has received a vaccine to protect against a disease.
The vaccine was effective, and the vaccinee showed no side effects.
Vaccinee → It is formed from "vaccine" (from Latin "vaccinus", meaning from a cow, derived from "vacca", meaning cow) and the suffix "-ee" (meaning a person who is the recipient of an action). The word "vaccinee" refers to a person who receives a vaccine.
Think of someone who is the recipient ('-ee') of a vaccine ('vaccine'), which originally comes from the Latin word for cow, as the first vaccines were derived from cowpox.