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    Vaccine

    vak-sēn

    Meaning & Definition

    noun
    A substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute.
    The flu vaccine is recommended for all individuals over six months of age.
    An antigenic preparation used to stimulate the immune response and confer protection against a specific disease.
    Many countries are implementing free vaccination programs to combat infectious diseases.
    The act of administering a vaccine to an individual.
    She received her COVID-19 vaccine at the local clinic.
    A preparation containing weakened or killed pathogens or antigens that is administered to induce immunity.
    After the vaccine was developed, clinical trials were conducted to ensure its safety.

    Etymology

    From Latin 'vacca' meaning cow, relating to the use of cowpox material in the first vaccine by Edward Jenner.

    Common Phrases and Expressions

    vaccine rollout
    The process by which a vaccine is distributed and made available to the public.
    vaccine hesitant
    Referring to individuals who are uncertain or skeptical about receiving vaccines.
    fully vaccinated
    Having received all necessary doses of a vaccine according to the recommended schedule.

    Related Words

    immunity
    The ability of an organism to resist infection or disease.
    antigen
    A substance that induces an immune response.
    pathogen
    An organism that causes disease.

    Slang Meanings

    vax
    I just got my vax last week.
    jab
    He's getting his jab tomorrow.