  The article begins with a description of chiral symmetry and its application
to neutrino induced reactions. For small $Q^2$ (forward direction) the process
is dominated by the amplitute with helicity zero where the pion pole disappears
when multiplied with the polarization vector. The remaining part of the
amplitude is determined by PCAC. For $E_\nu > 2$ GeV the computed cross
sections are in good agreement with data. In coherent pion production we expect
equal yields for neutrinos and antineutrinos a relation which for $E_\nu > 2$
GeV is fulfilled. We discuss specific features of the data and suggest methods
for improving them by presenting new estimates for the incoherent background.
