| Hepatitis D
 (HDV, delta virus) 
  
    circular single stranded RNA
    only infectious when cell also infected with hepatitis
    B
    when added to HBV causes more severe infectionHep D
    
      Activated by HBV. Use NBV vaccine.Respond poorly to interferon alfa (15-25%). High dose: 10Mī3 a week
        for 12/12) |