  QED radiative corrections to elastic electron-proton scattering at low
energies are discussed. Corrections to the electron line and effects due to
vacuum polarization are computed. Higher order effects are estimated for the
conditions of the experiment on the electric and magnetic proton form factors
by A1 Collaboration. Calculations are performed within the next-to-leading
approximation. Inclusion of the higher order effects can affect the value of
the proton charge radius extracted from the experimental data.
