That means higher mortality rate.
But you need to read in which context it is being used here to get the whole message: Nur geringe Übersterblichkeit – Todesfälle im April knapp über dem Schnitt. That is: Only a slightly higher mortality rate – The fatalities in April were just slightly above average.
My, that is odd, isn’t it? Wasn’t April the big Corona month in Germany? Just like everywhere else? And the country’s mortality rate was only slightly higher than usual? There must be a mistake here somewhere. Or were we all mislead to expect something else? Certainly not intentionally. Or was it just ineptitude? Numbers, black on white like that, can be very mysterious sometimes. Especially when they don’t fit your story line.
Im April sterben zwar mehr Menschen in Deutschland als im Durchschnitt – der Anstieg beträgt aber nur wenige Prozent.