Microbiology Delta hepatitis only occurs in patients who also have either acute or chronic infection with hepatitis B virus. The delta agent is A An incomplete hepatitis B virus B Related to hepatitis A virus C A hepatitis B mutant D An incomplete RNA virus 💡 Explanation Delta hepatitis only occurs in patients who also have either acute or chronic infection with hepatitis B virus. The delta agent is ✓ Correct Answer: D. An incomplete RNA virus