Amounts of HDV RNA and HBV DNA in liver and serum samples from HDV-positive patients. (A) Intrahepatic levels of HDV RNA and HBV DNA. (B) Serum levels of HDV RNA and HBV DNA. Median levels of HDV RNA and HBV DNA in the liver were 262 copies/cell (range, 4 to 3.1 × 105 copies/cell) and 3.5 copies/cell (range, 0.015 to 4.5 × 103 copies/cell), respectively, whereas median levels of HDV RNA and HBV DNA in serum were 1.9 × 104 copies/ml (range, 2 to 2.1 × 107 copies/ml) and 641 copies/ml (range, 70 to 9.4 × 107 copies/ml), respectively. Dots represent single patient measurements. The median is indicated with a long line, and the 25th and 75th percentiles are indicated with error bars.