Replicates viral genomic DNA. The replication complex is composed of six viral proteins: the DNA polymerase, processivity factor, primase, primase-associated factor, helicase, and ssDNA-binding protein. Additionally, the polymerase contains an intrinsic ribonuclease H (RNase H) activity that specifically degrades RNA/DNA heteroduplexes or duplex DNA substrates in the 5' to 3' direction. Therefore, it can catalyze the excision of the RNA primers that initiate the synthesis of Okazaki fragments at a replication fork during viral DNA replication (By similarity). a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) = diphosphate + DNA(n+1) Endonucleolytic cleavage to 5'-phosphomonoester. Forms a complex with the ssDNA-binding protein, the DNA polymerase processivity factor, and the alkaline exonuclease. Interacts with the putative helicase-primase complex subunit; this interaction may coordinate leading and lagging strand DNA synthesis at the replication fork (By similarity). The protein is present at discrete sites in nuclei, called replication compartments where viral DNA replication occurs. Belongs to the DNA polymerase type-B family.