Glossary Our extensive collection of web-based and other resources for patients, families, and caregivers provides easy access to information on a wide variety of subjects related to pancreatic cancer. All | # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z There are currently 3 Terms in this directory beginning with the letter V.VaccineA biological agent inserted into the body to prevent a disease.Vaccine therapyA treatment used to help the body's disease-fighting ability (immune system) prevent a disease.Vital organA functional group of tissue in the body that is necessary to live.