  The C12+C12 fusion cross sections show resonant behavior down to the lowest
energies accessible so far in the laboratory. If this tendency continues into
the astrophysical energy range, the stellar C12+C12 reaction rates have to be
corrected for resonant screening effects, in addition to the conventional
screening corrections. We estimate the resonant screening effects in the weak
electron screening limit for hydrostatic burning and white dwarf environments.
