CDK4/6i	cyclin-dependent kinases 4/6 inhibitors
HCWs	healthcare workers
AEs	adverse events
BL	baseline
1D	first vaccine dose
2D	second vaccine dose
RUs	relative units
AUs	arbitrary units
BAUs	binding antibody units
INF	interferon
PBMC	peripheral blood mononuclear cell
PBS	phosphate-buffered saline
FBS	fetal bovine serum
DMSO	dimethyl sulfoxide
Rb	retinoblastoma