| markers of hepatitis c and b virus infections among blood donors in ho chi minh city and hanoi, vietnam. | blood donors in two cities in vietnam were tested for markers of hepatitis c virus (hcv) and hepatitis b virus infections. antibody to hcv was detected by passive hemagglutination with antigens of the second generation in 101 (20.6%) of 491 donors in ho chi minh city; it was detected less frequently (p < 0.001) in donors in hanoi (4 [0.8%] of 499). hcv rna was tested for in donors with antibody by pcr with nested primers from the 5'-noncoding region and detected in 79 donors in ho chi minh city ... | 1994 | 8556478 |