| VAC | the act of protecting against disease by introducing a vaccine into the body to induce immunity |
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| VAC | taking a vaccine as a precaution against contracting a disease |
| VAC | the scar left following innoculation with a vaccine |
| VAC | a medical practitioner who inoculates people against diseases |
| VAC | immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies |
| VAC | a patient who has been vaccinated |
| VAC | a viral disease of cattle causing a mild skin disease affecting the udder |
| VAC | evergreen or deciduous berry-bearing shrubs of northern hemisphere: cranberries |
| VAC | low-growing deciduous shrub of northeastern North America having flowers in compact racemes and bearing sweet dark blue berries |
| VAC | shrub or small tree of eastern United States having black inedible berries |
| VAC | shrub of southeastern United States grown commercially especially for canning industry |
| VAC | low-growing tufted deciduous shrub of northern and alpine North America having pink to coral-red flowers followed by sweet blue berries |