CD46 and infection: They showed that (i) an anti-CD46 antibody inhibited HHV-6B (strain Z29) infection and HHV-6B-mediated cell fusion in PBMCs and (ii) the expression of CD46 in NIH3T3 cells (mouse fibroblasts) and EL4 cells (murine T lymphoblasts) caused HHV-6B- (strain-PL1-) mediated fusion and entry, respectively.