  We present a complete update of the analysis of electron neutrino and
antineutrino disappearance experiments in terms of neutrino oscillations in the
framework of 3+1 neutrino mixing, taking into account the Gallium anomaly, the
reactor anomaly, solar neutrino data and nu_e-C scattering data. We discuss the
implications of a recent 71Ga(3He,3H)71Ge measurement which give information on
the neutrino cross section in Gallium experiments. We discuss the solar bound
on active-sterile mixing and present our numerical results. We discuss the
connection between the results of the fit of neutrino oscillation data and the
heavy neutrino mass effects in beta-decay experiments (considering new Mainz
data) and neutrinoless double-beta decay experiments (considering the recent
EXO results).
