Investigational vaccines are still in the testing and evaluation phase and are not licensed for use in the general public.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#i</ref> | Investigational vaccines are still in the testing and evaluation phase and are not licensed for use in the general public.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#i</ref> |