  Charge exchange reactions at high energies are examined. The existing cross
section data on the Reggeon induced reaction pp $\rightarrow$ n + $\Delta^{++}$
taken at the ZGS and ISR accelerators are extrapolated to the energies of the
RHIC and LHC colliders. The interest in the charge exchange reaction induced by
$W^{\pm}$-fusion is presented, and the corresponding QCD-background is
examined.
