So the main feature is that a patient with a chronic evolution of infection has adaptive responses which are functionally impaired and certainly this is very important to allow virus persistence.
所以，主要特征是感染慢性进展的患者其获得性免疫应答在功能上受到损害，这对允许病毒持续存在非常重要。
2
AIM To observe the prevalence and clinical relevance of transfusion transmitted virus (TTV) infection in hemodialysis (HD) patients with chronic renal failure (CRF) and in professional blood donors.