探讨病毒性丁型肝炎的红细胞免疫。
OBJECTIVE to probe into the red cell immune function in viral hepatitis d.
乙肝与丁型肝炎病毒双重感染者其乙肝复制指标的检出率均显著低于单一乙肝感染者（P＜0．05）。
The positive rates of hepatitis B virus (HBV) replication markers in patients with HBVand HDV double infection were lower than the cases with only HBV infection (P<0. 05).
答：科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。
A: Scientists have identified five unique hepatitis viruses, identified by the letters a, b, c, d, and E. While all cause liver disease, they vary in important ways.
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