Cluster 313: hepatitis reactive qualitative detected hbsag rna hcv ribonucleic surface acid Cluster 568: virus hepatitis positive hcv immunodeficiency rna known hiv antigen ribonucleic Cluster 1467: hepatitis seronegative antibody antigen tested rna rt pcr hcv reverse Cluster 1858: hcv rna hepatitis positive antibody negative ribonucleic acid pcr virus Cluster 1942: hcv hepatitis hbv virus positive rna surface antigen antibody acid