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The $\sim 3\sigma$ discrepancy between the predicted and observed reactoranti-neutrino flux, known as the reactor anti-neutrino anomaly, continues tointrigue. The recent discovery of an unexpected bump in the reactoranti-neutrino spectrum, as well as indications that the flux deficit isdifferent for different fission isotopes seems to disfavour the explanation ofthe anomaly in terms of sterile neutrino oscillations. We critically reviewthis conclusion in view of all available data on electron (anti)neutrinodisappearance. We find that the sterile neutrino hypothesis cannot be rejectedbased on global data and is only mildly disfavored compared to an individualrescaling of neutrino fluxes from different fission isotopes. The main reasonfor this is the presence of spectral features in recent data from the NEOS andDANSS experiments. If state-of-the-art predictions for reactor fluxes are takenat face value, sterile neutrino oscillations allow a consistent description ofglobal data with a significance close to $3\sigma$ relative to theno-oscillation case. Even if reactor fluxes and spectra are left free in thefit, a $2\sigma$ hint in favour of sterile neutrinos remains, with allowedparameter regions consistent with an explanation of the anomaly in terms ofoscillations.

Sterile Neutrinos or Flux Uncertainties? - Status of the Reactor Anti-Neutrino Anomaly