title: TT virus in frequently transfused patients.
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004266:DNA Virus Infections / Q000209:etiology* / Q000821:virology; D004267:DNA Viruses / Q000235:genetics / Q000302:isolation & purification*; D004279:DNA, Viral / Q000737:chemistry; D005260:Female; D006402:Hematologic Diseases / Q000628:therapy; D006525:Hepatitis, Viral, Human / Q000209:etiology* / Q000821:virology; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods; D065227:Transfusion Reaction