That question answered, Saïb started working
on how
foamy viruses move within cells to import their genome into the host cell's nucleus, which is what his adviser considers his most important work.
However, subsequent studies carried out
on small numbers (20 — 30) of CFS patients, failed to confirm evidence for HTLV (type 1 or 11)[22]--[25] or other retroviruses, including the closely - related simian T lymphotropic
virus type l, the prototype
foamy virus, simian retrovirus, bovine and feline leukaemia
viruses [26] and HIV - 1 [23].