A preparation intended to induce protective immune memory or another useful immune response against a target. The induced response is a mechanism; reduction of infection, severe disease or another outcome requires appropriate evidence.
Administration of a vaccine to induce a useful immune response. Receipt of a dose, development of measurable antibodies and protection from disease are distinct endpoints, so vaccination status does not directly measure every part of immunity.
A person's reported intention or willingness to receive a vaccine under the conditions of a question. It is distinct from actual vaccination status. The response depends on the question, time and circumstances; an intention score does not directly measure later receipt or a medical effect.
A record of which vaccinations a person has received at a specified time. A binary categorical variable may collapse this into two recorded categories; the categories alone do not specify number of doses, timing, protective immunity or willingness to receive a vaccine.
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