Fig. 1From: Multiple oncogenic viruses are present in human breast tissues before development of virus associated breast cancerEBVÂ and HPV nucleotide sequences shown by in situ PCR in the nuclei of the same breast cancer cells (ductal carcinoma in situ). a EBV in breast cancer cell nuclei. b HPV in breast cancer cell nuclei. c Haematoxylin and eosin (H & E) stain. d Negative controls. No PCR primersBack to article page