... manifestations including erythema infectiosum in children, polyarthropathy syndrome in adults, tran-sient aplastic crisis inpatients with chronic anemia, persistent infections manifesting as chronic ... anemia in immunocompromised patients, transplant recipients, and hydrops fetalis and fetal death by intrauterine infection. Aplastic anemia, which occurs in 33% of children and 5% of adult patients ... viral proteins: VP1 and NP2, the viral capsid proteins, and NS1, a nonstructural protein. Both VP1 and VP2 are derived from overlapping reading frames and share substantial amino acid sequences....