Abstract The advent of whole genome sequencing has revealed that common laboratory strains of human cytomegalovirus (HCMV) have major genetic deficiencies resulting from serial passage in fibroblasts. In particular. tropism for epithelial and endothelial cells is lost due to mutations disrupting genes UL128. UL130. https://www.parisnaturalfoodes.shop/product-category/vit-d3-liquid/