An adenoviral vaccine is a type of vaccine that uses a modified version of a common virus, known as an adenovirus, to deliver genetic material from a pathogen, such as a virus or bacterium. This genetic material instructs the body’s cells to produce a harmless piece of the pathogen, prompting an immune response. This helps the body recognize and fight the actual pathogen if exposed in the future. Adenoviral vaccines have been researched for various diseases, including COVID-19 and Ebola. They are designed to be effective and can be produced relatively quickly, making them a valuable tool in responding to emerging infectious diseases.