Changes

[[Hepatitis D]] is a defective virus that needs the [[Hepatitis B]] virus to exist.  

According to the [[Centers for Disease Control and Prevention]], [[Hepatitis D]] "is a defective virus that needs the [[Hepatitis B]] virus to exist.  

Hepatitis D virus (HDV) is found in the blood of persons infected with the [[virus]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#h</ref>

Hepatitis D virus (HDV) is found in the blood of persons infected with the [[virus]]."<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#h</ref>

==References==

==References==