"Even though fetal cells are used to grow vaccine viruses, vaccines do not contain these cells or pieces of DNA that are recognizable as human DNA. People can be reassured by the following: *When viruses grow in cells, the cells are killed because in most cases the new viruses burst the cells to be released. *Once the vaccine virus is grown, it is purified, so that cellular debris and growth reagents are removed. *During this process of purification, any remaining cellular DNA is also broken down. To learn more about DNA and vaccine, visit the “Vaccine ingredients – DNA” page."