TNFRSF1B and cytomegalovirus infection: Irrespective if cells express tnfr2 constitutively (MRC-5) or conditionally upon HCMV infection (BJ-5ta), ULb’-positive HCMVs (AD169varL) strongly enhanced TNFR2 surface levels, while ULb’-negative HCMVs (AD169varS) did not.