SLC20A1 and infection: The sodium-dependent phosphate transporter 1 (PiT1 or SLC20A1) has been described as an entry receptor for both GALV and KoRVA, while KoRVB employs the thiamine transporter 1 (THTR1 or SLC19A2) for infection of host cells [40], which sparked an interest in regard to their potential to enable viral entry into immune cells.