Adenoviral vaccines use a modified version of a common virus, known as an adenovirus, to deliver genetic material from a target 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. These vaccines are being researched and developed for various diseases, including COVID-19. They are known for their ability to induce strong immune responses and can be produced relatively quickly, making them a valuable tool in public health efforts against infectious diseases.