  Recently, the next-to-next-to-leading order (NNLO) electroweak corrections
with fermion loops to the Higgsstrahling process were computed. Here we present
numerical results for polarized electron/positron beams, as well as for two
input parameter schemes known as the $\alpha(0)$ and $G_\mu$ schemes. The size
of the NNLO corrections strongly depends on the beam polarization, leading to
an increase of the $ZH$ cross-section by 0.76% for $e^+_{\rm L} e^-_{\rm R}$
beams, and a decrease of 0.04% for $e^+_{\rm R} e^-_{\rm L}$ beams.
Furthermore, inclusion of the NNLO corrections is found to significantly reduce
the discrepancy between the results in the $\alpha(0)$ and $G_\mu$ schemes.
Using the remaining difference, together with other methods, the theory
uncertainty from missing bosonic electroweak corrections is estimated to be
less than 0.3%.
