vax

/V AE1 K S/
noun
  1. 1

    Inoculation with a vaccine, in order to protect from a particular disease or strain of disease.

noun
  1. 1

    A substance given to stimulate the body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a related, also effective, but safer disease), or a synthetic substitute.

Source: https://en.wiktionary.org/wiki/vaccination, https://en.wiktionary.org/wiki/vaccine, https://en.wiktionary.org/wiki/vax