> there’s a hotline for getting codes when the laboratory can’t get you one This cannot be overstated and is generally underestimated by developers. Setting up

> there’s a hotline for getting codes when the laboratory can’t get you one This cannot be overstated and is generally underestimated by developers. Setting up a hotline infrastructure (actually it's two hotlines, one which is more like a helpdesk for customers of the app and one for the lab stuff) and operating it produces significant initial and ongoing cost. Also they will still have additional ongoing cost for infrastructure (server operation, traffic) and cost for support regarding the still-to-be-performed process of interfacing the lab information systems of the 140-or-so labs in Germany with the Corona App Backend infrastructure (which is necessary to allow for the lab hotline and TAN stuff to become replaced by direct transmission of test results to the user via the app and its backend). If those operating costs even just for the near/foreseeable future are included in the 20M€, I consider that a fair sum.