The term 'Vaccine Holder' can be summarized as a VIAL, which is a four-letter word. A VIAL is a small container, usually made of glass or plastic, that is used to store and transport liquids such as vaccines. Vials are often used in medical settings to store and transport medications, vaccines, and other substances. They are also used in laboratories for research purposes. Vials are designed to be airtight and leak-proof, ensuring the safety and integrity of the contents.